From 746eff9b25c979041618f25f9bcc04c6847c1044 Mon Sep 17 00:00:00 2001
From: Internshala-Online-Trainings
 <48007951+Internshala-Online-Trainings@users.noreply.github.com>
Date: Mon, 4 Mar 2019 12:34:19 +0530
Subject: [PATCH] Add files via upload

---
 .../Topic 01 - PHP Introduction/PHP/ReadMe.md |  8 +++
 .../PHP/php_introduction.php                  |  3 +
 .../Topic 02 - Basics/Basic Syntax/ReadMe.md  |  8 +++
 .../Basic Syntax/html_in_echo_statement.php   | 12 ++++
 .../Basic Syntax/multiple_line_comment.php    | 14 +++++
 .../Basic Syntax/php_in_title.php             | 12 ++++
 .../Basic Syntax/single_line_comment.php      | 12 ++++
 .../Topic 02 - Basics/Concatenation/ReadMe.md |  8 +++
 .../concatenation_of_different_datatypes.php  | 13 ++++
 .../Concatenation/concatention_of_strings.php | 13 ++++
 .../ReadMe.md                                 |  8 +++
 .../addition.php                              | 14 +++++
 .../gettype.php                               | 13 ++++
 .../Arrays/ReadMe.md                          |  8 +++
 .../Arrays/associative_array.php              | 13 ++++
 .../Arrays/indexed_array.php                  | 13 ++++
 .../Arrays/print_r.php                        | 12 ++++
 .../Arrays/sizeof.php                         | 14 +++++
 .../Arrays/two_dimensional_array.php          | 13 ++++
 .../Functions/ReadMe.md                       |  8 +++
 .../Functions/sum_function.php                | 21 +++++++
 .../Functions/sum_function_with_echo.php      | 21 +++++++
 .../Strings/ReadMe.md                         |  8 +++
 .../Strings/concatenation.php                 |  4 ++
 .../Strings/declare_string_variable.php       |  4 ++
 .../Strings/echo_double_quotes.php            |  4 ++
 .../Strings/strlen.php                        |  6 ++
 .../Strings/variable_inside_double_quotes.php |  5 ++
 .../Strings/variable_inside_single_quotes.php |  5 ++
 .../Topic 04 - Loops/For & Foreach/ReadMe.md  |  8 +++
 .../Topic 04 - Loops/For & Foreach/for.php    |  6 ++
 .../foreach-assosiative-array.php             |  7 +++
 .../For & Foreach/foreach-indexed-array.php   |  7 +++
 .../Topic 04 - Loops/Loops/ReadMe.md          |  8 +++
 .../Loops/boolean-variable.php                |  9 +++
 .../Topic 04 - Loops/Loops/if-else-if.php     | 13 ++++
 .../Topic 04 - Loops/Loops/if-else.php        |  9 +++
 .../Topic 04 - Loops/While Loops/ReadMe.md    |  8 +++
 .../Topic 04 - Loops/While Loops/while.php    |  8 +++
 .../Database Connection/ReadMe.md             |  8 +++
 .../Database Connection/mysqli_connect.php    |  4 ++
 .../Displaying Users Data/ReadMe.md           |  8 +++
 .../mysql_fetch_array_used_twice.php          | 16 +++++
 .../mysqli_fetch_array.php                    |  9 +++
 ...qli_fetch_array_with_assosiative_array.php | 10 ++++
 .../Select Query in PHP/ReadMe.md             |  8 +++
 .../Select Query in PHP/mysqli_num_rows.php   |  8 +++
 .../Select Query in PHP/mysqli_query.php      |  6 ++
 .../ReadMe.md                                 |  8 +++
 .../products_purchased_function.php           | 53 +++++++++++++++++
 .../ReadMe.md                                 |  8 +++
 .../mysqli_fetch_array_with_bootstrap.php     | 38 ++++++++++++
 .../mysqli_fetch_array_with_while_loop.php    | 40 +++++++++++++
 .../Inserting Data Using Forms/ReadMe.md      |  8 +++
 .../Inserting Data Using Forms/index.php      | 50 ++++++++++++++++
 .../user_registration_script.php              | 11 ++++
 .../Security Features/ReadMe.md               |  8 +++
 .../Security Features/index.php               | 50 ++++++++++++++++
 .../user_registration_script.php              | 12 ++++
 .../Topic 09 - Sessions/Sessions/ReadMe.md    |  8 +++
 .../Topic 09 - Sessions/Sessions/index.php    | 50 ++++++++++++++++
 .../Sessions/index_with_isset.php             | 59 +++++++++++++++++++
 .../Topic 09 - Sessions/Sessions/logout.php   |  5 ++
 .../Sessions/update_name.php                  | 10 ++++
 .../Sessions/user_registration_script.php     | 14 +++++
 .../Include/ReadMe.md                         |  8 +++
 .../Include/common.php                        |  5 ++
 .../Include/header.php                        | 14 +++++
 .../Include/index-with-common-file.php        | 25 ++++++++
 .../Include/index-with-include.php            | 22 +++++++
 .../Include/index-with-require.php            | 25 ++++++++
 .../Security Features/ReadMe.md               |  8 +++
 .../Security Features/md5.php                 |  5 ++
 .../PHP Validation/ReadMe.md                  |  8 +++
 .../index-_with_error_message.php             | 40 +++++++++++++
 .../PHP Validation/index.php                  | 37 ++++++++++++
 .../PHP Validation/login_script.php           | 16 +++++
 .../login_script_with_header.php              | 15 +++++
 .../Validations/ReadMe.md                     |  8 +++
 .../Validations/index.php                     | 37 ++++++++++++
 80 files changed, 1162 insertions(+)
 create mode 100644 Module 4 - PHP/Topic 01 - PHP Introduction/PHP/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 01 - PHP Introduction/PHP/php_introduction.php
 create mode 100644 Module 4 - PHP/Topic 02 - Basics/Basic Syntax/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 02 - Basics/Basic Syntax/html_in_echo_statement.php
 create mode 100644 Module 4 - PHP/Topic 02 - Basics/Basic Syntax/multiple_line_comment.php
 create mode 100644 Module 4 - PHP/Topic 02 - Basics/Basic Syntax/php_in_title.php
 create mode 100644 Module 4 - PHP/Topic 02 - Basics/Basic Syntax/single_line_comment.php
 create mode 100644 Module 4 - PHP/Topic 02 - Basics/Concatenation/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 02 - Basics/Concatenation/concatenation_of_different_datatypes.php
 create mode 100644 Module 4 - PHP/Topic 02 - Basics/Concatenation/concatention_of_strings.php
 create mode 100644 Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/addition.php
 create mode 100644 Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/gettype.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/associative_array.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/indexed_array.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/print_r.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/sizeof.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/two_dimensional_array.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/sum_function.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/sum_function_with_echo.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/concatenation.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/declare_string_variable.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/echo_double_quotes.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/strlen.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/variable_inside_double_quotes.php
 create mode 100644 Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/variable_inside_single_quotes.php
 create mode 100644 Module 4 - PHP/Topic 04 - Loops/For & Foreach/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 04 - Loops/For & Foreach/for.php
 create mode 100644 Module 4 - PHP/Topic 04 - Loops/For & Foreach/foreach-assosiative-array.php
 create mode 100644 Module 4 - PHP/Topic 04 - Loops/For & Foreach/foreach-indexed-array.php
 create mode 100644 Module 4 - PHP/Topic 04 - Loops/Loops/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 04 - Loops/Loops/boolean-variable.php
 create mode 100644 Module 4 - PHP/Topic 04 - Loops/Loops/if-else-if.php
 create mode 100644 Module 4 - PHP/Topic 04 - Loops/Loops/if-else.php
 create mode 100644 Module 4 - PHP/Topic 04 - Loops/While Loops/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 04 - Loops/While Loops/while.php
 create mode 100644 Module 4 - PHP/Topic 05 - Database Connection/Database Connection/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 05 - Database Connection/Database Connection/mysqli_connect.php
 create mode 100644 Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysql_fetch_array_used_twice.php
 create mode 100644 Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysqli_fetch_array.php
 create mode 100644 Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysqli_fetch_array_with_assosiative_array.php
 create mode 100644 Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/mysqli_num_rows.php
 create mode 100644 Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/mysqli_query.php
 create mode 100644 Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Data Calculation Using Functions/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Data Calculation Using Functions/products_purchased_function.php
 create mode 100644 Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/mysqli_fetch_array_with_bootstrap.php
 create mode 100644 Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/mysqli_fetch_array_with_while_loop.php
 create mode 100644 Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/index.php
 create mode 100644 Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/user_registration_script.php
 create mode 100644 Module 4 - PHP/Topic 08 - Form/Security Features/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 08 - Form/Security Features/index.php
 create mode 100644 Module 4 - PHP/Topic 08 - Form/Security Features/user_registration_script.php
 create mode 100644 Module 4 - PHP/Topic 09 - Sessions/Sessions/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 09 - Sessions/Sessions/index.php
 create mode 100644 Module 4 - PHP/Topic 09 - Sessions/Sessions/index_with_isset.php
 create mode 100644 Module 4 - PHP/Topic 09 - Sessions/Sessions/logout.php
 create mode 100644 Module 4 - PHP/Topic 09 - Sessions/Sessions/update_name.php
 create mode 100644 Module 4 - PHP/Topic 09 - Sessions/Sessions/user_registration_script.php
 create mode 100644 Module 4 - PHP/Topic 10 - Basic security/Include/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 10 - Basic security/Include/common.php
 create mode 100644 Module 4 - PHP/Topic 10 - Basic security/Include/header.php
 create mode 100644 Module 4 - PHP/Topic 10 - Basic security/Include/index-with-common-file.php
 create mode 100644 Module 4 - PHP/Topic 10 - Basic security/Include/index-with-include.php
 create mode 100644 Module 4 - PHP/Topic 10 - Basic security/Include/index-with-require.php
 create mode 100644 Module 4 - PHP/Topic 10 - Basic security/Security Features/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 10 - Basic security/Security Features/md5.php
 create mode 100644 Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/index-_with_error_message.php
 create mode 100644 Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/index.php
 create mode 100644 Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/login_script.php
 create mode 100644 Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/login_script_with_header.php
 create mode 100644 Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/Validations/ReadMe.md
 create mode 100644 Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/Validations/index.php

diff --git a/Module 4 - PHP/Topic 01 - PHP Introduction/PHP/ReadMe.md b/Module 4 - PHP/Topic 01 - PHP Introduction/PHP/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 01 - PHP Introduction/PHP/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 01 - PHP Introduction/PHP/php_introduction.php b/Module 4 - PHP/Topic 01 - PHP Introduction/PHP/php_introduction.php
new file mode 100644
index 0000000..7eb9482
--- /dev/null
+++ b/Module 4 - PHP/Topic 01 - PHP Introduction/PHP/php_introduction.php	
@@ -0,0 +1,3 @@
+<?php
+echo "Hello! I want to be a web developer.";
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/ReadMe.md b/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/html_in_echo_statement.php b/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/html_in_echo_statement.php
new file mode 100644
index 0000000..85bb3c3
--- /dev/null
+++ b/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/html_in_echo_statement.php	
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>PHP Syntax</title>
+    </head>
+    <body>
+        <?php
+        // This is a single line comment
+        echo "<h1>I am the Batman!</h1>";
+        ?>
+    </body>
+</html>
diff --git a/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/multiple_line_comment.php b/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/multiple_line_comment.php
new file mode 100644
index 0000000..8569235
--- /dev/null
+++ b/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/multiple_line_comment.php	
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>PHP Syntax</title>
+    </head>
+    <body>
+        <?php
+        // This is a single line comment
+        echo "I am the Batman!";
+        /* This is a multi line comment
+          I.e. it is used to write comments in two or more lines */
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/php_in_title.php b/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/php_in_title.php
new file mode 100644
index 0000000..6537e4f
--- /dev/null
+++ b/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/php_in_title.php	
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title><?php echo "Batman"; ?></title>
+    </head>
+    <body>
+        <?php
+        // This is a single line comment
+        echo "<h1>I am the Batman!</h1>";
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/single_line_comment.php b/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/single_line_comment.php
new file mode 100644
index 0000000..83f9f56
--- /dev/null
+++ b/Module 4 - PHP/Topic 02 - Basics/Basic Syntax/single_line_comment.php	
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>PHP Syntax</title>
+    </head>
+    <body>
+        <?php
+        //This is a single line comment
+        echo"I am the Batman!";
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 02 - Basics/Concatenation/ReadMe.md b/Module 4 - PHP/Topic 02 - Basics/Concatenation/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 02 - Basics/Concatenation/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 02 - Basics/Concatenation/concatenation_of_different_datatypes.php b/Module 4 - PHP/Topic 02 - Basics/Concatenation/concatenation_of_different_datatypes.php
new file mode 100644
index 0000000..5ef4666
--- /dev/null
+++ b/Module 4 - PHP/Topic 02 - Basics/Concatenation/concatenation_of_different_datatypes.php	
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Variables, Data types and Operators</title>
+    </head>
+    <body>
+        <?php
+        $var1 = 18;
+        $var2 = 12;
+        echo "The value of first variable is " . $var1 . " and the value of second variable is " . $var2;
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 02 - Basics/Concatenation/concatention_of_strings.php b/Module 4 - PHP/Topic 02 - Basics/Concatenation/concatention_of_strings.php
new file mode 100644
index 0000000..1745711
--- /dev/null
+++ b/Module 4 - PHP/Topic 02 - Basics/Concatenation/concatention_of_strings.php	
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Variables, Data types and Operators</title>
+    </head>
+    <body>
+        <?php
+        $var1 = "Hello";
+        $var2 = "Internshala";
+        echo $var1 . $var2;
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/ReadMe.md b/Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/addition.php b/Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/addition.php
new file mode 100644
index 0000000..8aec40d
--- /dev/null
+++ b/Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/addition.php	
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Variables, Data types and Operators</title>
+    </head>
+    <body>
+        <?php
+        $var1 = 18;
+        $var2 = 12;
+        $sum = $var1 + $var2;
+        Echo $sum;
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/gettype.php b/Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/gettype.php
new file mode 100644
index 0000000..0dd46f4
--- /dev/null
+++ b/Module 4 - PHP/Topic 02 - Basics/Variables, Datatypes, and Operators/gettype.php	
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Variables, Data types and Operators</title>
+    </head>
+    <body>
+        <?php
+        $var1 = 18;
+        $var2 = 12;
+        echo gettype($var1);
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/ReadMe.md b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/associative_array.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/associative_array.php
new file mode 100644
index 0000000..bdd316d
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/associative_array.php	
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Arrays</title>
+    </head>
+    <body>
+        <?php
+        $numbers = array("first_number" => 18, "second_number" => 12);
+        $sum = $numbers["first_number"] + $numbers["second_number"];
+        echo "Sum of two variables is " . $sum . ".";
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/indexed_array.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/indexed_array.php
new file mode 100644
index 0000000..204a085
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/indexed_array.php	
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Arrays</title>
+    </head>
+    <body>
+        <?php
+        $numbers = array(18, 12);
+        $sum = $numbers[0] + $numbers[1];
+        echo "Sum of two variables is " . $sum . ".";
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/print_r.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/print_r.php
new file mode 100644
index 0000000..e2e80bd
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/print_r.php	
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Arrays</title>
+    </head>
+    <body>
+        <?php
+        $numbers = array("first_number" => 18, "second_number" => 12);
+        print_r($numbers);
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/sizeof.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/sizeof.php
new file mode 100644
index 0000000..e355d60
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/sizeof.php	
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Arrays</title>
+    </head>
+    <body>
+        <?php
+        $numbers = array(18, 12);
+        $sum = $numbers[0] + $numbers[1];
+        echo "Sum of two variables is " . $sum . ".";
+        echo "Length of the array is " . sizeof($numbers);
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/two_dimensional_array.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/two_dimensional_array.php
new file mode 100644
index 0000000..2192808
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Arrays/two_dimensional_array.php	
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Arrays</title>
+    </head>
+    <body>
+        <?php
+        $numbers = array(array(18, 12), array(1, 2));
+        $sum = $numbers[0][0] + $numbers[0][1];
+        echo "Sum of two variables is " . $sum . ".";
+        ?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/ReadMe.md b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/sum_function.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/sum_function.php
new file mode 100644
index 0000000..17bcf89
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/sum_function.php	
@@ -0,0 +1,21 @@
+<?php
+
+function sum($parameter1, $parameter2) {
+  $addition = $parameter1 + $parameter2;
+  return $addition;
+}
+?>
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Functions</title>
+    </head>
+    <body>
+<?php
+$var1 = 18;
+$var2 = 12;
+$sum = sum($var1, $var2);
+echo "Sum of two variables is " . $sum . ".";
+?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/sum_function_with_echo.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/sum_function_with_echo.php
new file mode 100644
index 0000000..cd732c4
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Functions/sum_function_with_echo.php	
@@ -0,0 +1,21 @@
+<?php
+
+function sum($parameter1, $parameter2 = 0) {
+  $addition = $parameter1 + $parameter2;
+  echo "Sum of two variables is " . $addition . ".";
+  return;
+}
+?>
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Functions</title>
+    </head>
+    <body>
+<?php
+$var1 = 18;
+$var2 = 12;
+sum($var1, $var2);
+?>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/ReadMe.md b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/concatenation.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/concatenation.php
new file mode 100644
index 0000000..4f9fb71
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/concatenation.php	
@@ -0,0 +1,4 @@
+<?php
+$variable1 = 18;
+echo  'The value of variable1 is '.$variable1;
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/declare_string_variable.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/declare_string_variable.php
new file mode 100644
index 0000000..9cbce16
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/declare_string_variable.php	
@@ -0,0 +1,4 @@
+<?php
+$variable1 = 18;
+$variable2 = "I am a string.";
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/echo_double_quotes.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/echo_double_quotes.php
new file mode 100644
index 0000000..810dbb6
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/echo_double_quotes.php	
@@ -0,0 +1,4 @@
+<?php
+$variable1 = 18;
+echo  'I am a "string".';
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/strlen.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/strlen.php
new file mode 100644
index 0000000..14eb9be
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/strlen.php	
@@ -0,0 +1,6 @@
+<?php
+
+$string1 = "I am first string";
+$length_of_string = strlen($string1);
+echo $length_of_string;
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/variable_inside_double_quotes.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/variable_inside_double_quotes.php
new file mode 100644
index 0000000..ce056a8
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/variable_inside_double_quotes.php	
@@ -0,0 +1,5 @@
+<?php
+
+$variable1 = 18;
+echo "The value of variable1 is $variable1";
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/variable_inside_single_quotes.php b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/variable_inside_single_quotes.php
new file mode 100644
index 0000000..95d3f02
--- /dev/null
+++ b/Module 4 - PHP/Topic 03 - Functions_Arrays_Strings/Strings/variable_inside_single_quotes.php	
@@ -0,0 +1,5 @@
+<?php
+
+$variable1 = 18;
+echo 'The value of variable1 is $variable1 ';
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 04 - Loops/For & Foreach/ReadMe.md b/Module 4 - PHP/Topic 04 - Loops/For & Foreach/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 04 - Loops/For & Foreach/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 04 - Loops/For & Foreach/for.php b/Module 4 - PHP/Topic 04 - Loops/For & Foreach/for.php
new file mode 100644
index 0000000..a655eb1
--- /dev/null
+++ b/Module 4 - PHP/Topic 04 - Loops/For & Foreach/for.php	
@@ -0,0 +1,6 @@
+<?php
+
+for ($counter = 1; $counter <= 5; $counter++) {
+  echo $counter . "<br>";
+}
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 04 - Loops/For & Foreach/foreach-assosiative-array.php b/Module 4 - PHP/Topic 04 - Loops/For & Foreach/foreach-assosiative-array.php
new file mode 100644
index 0000000..bdcb7eb
--- /dev/null
+++ b/Module 4 - PHP/Topic 04 - Loops/For & Foreach/foreach-assosiative-array.php	
@@ -0,0 +1,7 @@
+<?php
+
+$marks = array("first_number" => 4, "second_number" => 8);
+foreach ($marks as $mark_index => $mark_value) {
+  echo "The index is $mark_index, the value is $mark_value <br/>";
+}
+?>  
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 04 - Loops/For & Foreach/foreach-indexed-array.php b/Module 4 - PHP/Topic 04 - Loops/For & Foreach/foreach-indexed-array.php
new file mode 100644
index 0000000..b762118
--- /dev/null
+++ b/Module 4 - PHP/Topic 04 - Loops/For & Foreach/foreach-indexed-array.php	
@@ -0,0 +1,7 @@
+<?php
+
+$marks = array(4, 8, 15, 16, 23, 42);
+foreach ($marks as $mark) {
+  echo $mark . ", ";
+}
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 04 - Loops/Loops/ReadMe.md b/Module 4 - PHP/Topic 04 - Loops/Loops/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 04 - Loops/Loops/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 04 - Loops/Loops/boolean-variable.php b/Module 4 - PHP/Topic 04 - Loops/Loops/boolean-variable.php
new file mode 100644
index 0000000..b9e688c
--- /dev/null
+++ b/Module 4 - PHP/Topic 04 - Loops/Loops/boolean-variable.php	
@@ -0,0 +1,9 @@
+<?php
+
+$status = TRUE;
+if ($status) {
+  echo "The student has passed";
+} else {
+  echo "The student has failed";
+}
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 04 - Loops/Loops/if-else-if.php b/Module 4 - PHP/Topic 04 - Loops/Loops/if-else-if.php
new file mode 100644
index 0000000..dccff1f
--- /dev/null
+++ b/Module 4 - PHP/Topic 04 - Loops/Loops/if-else-if.php	
@@ -0,0 +1,13 @@
+<?php
+
+$marks = 50;
+if ($marks == 40) {
+  echo "The student has just passed";
+} else if (($marks > 40) && ($marks < 90)) {
+  echo "The student has passed";
+} else if ($marks > 90) {
+  echo "The student is in the merit list";
+} else {
+  echo "The student has failed.";
+}
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 04 - Loops/Loops/if-else.php b/Module 4 - PHP/Topic 04 - Loops/Loops/if-else.php
new file mode 100644
index 0000000..eeadd42
--- /dev/null
+++ b/Module 4 - PHP/Topic 04 - Loops/Loops/if-else.php	
@@ -0,0 +1,9 @@
+<?php
+
+$marks = 50;
+if ($marks >= 40) {
+  echo "The student has passed";
+} else {
+  echo "The student has failed";
+}
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 04 - Loops/While Loops/ReadMe.md b/Module 4 - PHP/Topic 04 - Loops/While Loops/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 04 - Loops/While Loops/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 04 - Loops/While Loops/while.php b/Module 4 - PHP/Topic 04 - Loops/While Loops/while.php
new file mode 100644
index 0000000..6909652
--- /dev/null
+++ b/Module 4 - PHP/Topic 04 - Loops/While Loops/while.php	
@@ -0,0 +1,8 @@
+<?php
+
+$counter = 1;
+while ($counter <= 5) {
+  echo $counter . "<br>";
+  $counter++;
+}
+?>
diff --git a/Module 4 - PHP/Topic 05 - Database Connection/Database Connection/ReadMe.md b/Module 4 - PHP/Topic 05 - Database Connection/Database Connection/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 05 - Database Connection/Database Connection/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 05 - Database Connection/Database Connection/mysqli_connect.php b/Module 4 - PHP/Topic 05 - Database Connection/Database Connection/mysqli_connect.php
new file mode 100644
index 0000000..8fce559
--- /dev/null
+++ b/Module 4 - PHP/Topic 05 - Database Connection/Database Connection/mysqli_connect.php	
@@ -0,0 +1,4 @@
+<?php
+
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/ReadMe.md b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysql_fetch_array_used_twice.php b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysql_fetch_array_used_twice.php
new file mode 100644
index 0000000..ebfcbd4
--- /dev/null
+++ b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysql_fetch_array_used_twice.php	
@@ -0,0 +1,16 @@
+<?php
+
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+$select_query = "SELECT id, email, first_name FROM users";
+$select_query_result = mysqli_query($con, $select_query) or die(mysqli_error($con));
+$row = mysqli_fetch_array($select_query_result);
+echo $row['id'] . "<br/>";
+echo $row['email'] . "<br/>";
+echo $row['first_name'] . "<br/>";
+
+
+$row = mysqli_fetch_array($select_query_result);
+echo $row['id'] . "<br/>";
+echo $row['email'] . "<br/>";
+echo $row['first_name'] . "<br/>";
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysqli_fetch_array.php b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysqli_fetch_array.php
new file mode 100644
index 0000000..d8b86be
--- /dev/null
+++ b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysqli_fetch_array.php	
@@ -0,0 +1,9 @@
+<?php
+
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+$select_query = "SELECT id, email, first_name FROM users";
+$select_query_result = mysqli_query($con, $select_query) or die(mysqli_error($con));
+$row = mysqli_fetch_array($select_query_result);
+echo $row[0]."<br/>";
+echo $row[1]."<br/>";
+echo $row[2];
diff --git a/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysqli_fetch_array_with_assosiative_array.php b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysqli_fetch_array_with_assosiative_array.php
new file mode 100644
index 0000000..da62ba0
--- /dev/null
+++ b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Displaying Users Data/mysqli_fetch_array_with_assosiative_array.php	
@@ -0,0 +1,10 @@
+<?php
+
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+$select_query = "SELECT id, email, first_name FROM users";
+$select_query_result = mysqli_query($con, $select_query) or die(mysqli_error($con));
+$row = mysqli_fetch_array($select_query_result);
+echo $row['id'] . "<br/>";
+echo $row['email'] . "<br/>";
+echo $row['first_name'];
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/ReadMe.md b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/mysqli_num_rows.php b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/mysqli_num_rows.php
new file mode 100644
index 0000000..95bd821
--- /dev/null
+++ b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/mysqli_num_rows.php	
@@ -0,0 +1,8 @@
+<?php
+
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+$select_query = "SELECT id, email, first_name FROM user";
+$select_query_result = mysqli_query($con, $select_query) or die(mysqli_error($con));
+$total_rows_fetched = mysqli_num_rows($select_query_result);
+echo $total_rows_fetched;
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/mysqli_query.php b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/mysqli_query.php
new file mode 100644
index 0000000..f6112ce
--- /dev/null
+++ b/Module 4 - PHP/Topic 06 - SELECT Query with PHP (Part I)/Select Query in PHP/mysqli_query.php	
@@ -0,0 +1,6 @@
+<?php
+
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+$select_query = "SELECT id, email, first_name FROM users";
+$select_query_result = mysqli_query($con, $select_query) or die(mysqli_error($con));
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Data Calculation Using Functions/ReadMe.md b/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Data Calculation Using Functions/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Data Calculation Using Functions/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Data Calculation Using Functions/products_purchased_function.php b/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Data Calculation Using Functions/products_purchased_function.php
new file mode 100644
index 0000000..2709e1e
--- /dev/null
+++ b/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Data Calculation Using Functions/products_purchased_function.php	
@@ -0,0 +1,53 @@
+<?php
+$con = mysqli_connect("localhost", "root", "", "ecommerce")or die($mysqli_error($con));
+$select_query = "SELECT  id, email, first_name FROM users";
+$select_query_result = mysqli_query($con, $select_query) or die(mysqli_error($con));
+?>
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Users</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+    </head>
+</head>
+<body>
+    <div class="container">
+        <?php while ($row = mysqli_fetch_array($select_query_result)) { ?>
+          <div class="row">
+              <div class="col-lg-12"><h4>User</h4></div>
+          </div>
+          <div class="row">
+              <div class="col-xs-2">ID</div>
+              <div class="col-xs-10"><?php echo $row['id']; ?></div>
+          </div>
+          <div class="row">
+              <div class="col-xs-2">Email</div>
+              <div class="col-xs-10"><?php echo $row['email']; ?></div>
+          </div>
+          <div class="row">
+              <div class="col-xs-2">First Name</div>
+              <div class="col-xs-10"><?php echo $row['first_name']; ?></div>
+          </div>
+          <div class="row">
+              <div class="col-xs-2">Products</div>
+              <div class="col-xs-10"><?php echo number_of_products_purchased($con, $row['id']); ?></div>
+          </div>
+          <hr/>
+        <?php } ?>
+    </div>
+</body>
+</html>
+<?php
+
+function number_of_products_purchased($con, $user_id) {
+  $users_products_query = "SELECT  id FROM users_products WHERE user_id = '$user_id'";
+  $users_products_result = mysqli_query($con, $users_products_query);
+  $number_of_products = mysqli_num_rows($users_products_result);
+  return $number_of_products;
+}
+?>
diff --git a/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/ReadMe.md b/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/mysqli_fetch_array_with_bootstrap.php b/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/mysqli_fetch_array_with_bootstrap.php
new file mode 100644
index 0000000..f8ca0ca
--- /dev/null
+++ b/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/mysqli_fetch_array_with_bootstrap.php	
@@ -0,0 +1,38 @@
+<?php
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+$select_query = "SELECT  id, email, first_name FROM users";
+$select_query_result = mysqli_query($con, $select_query) or die(mysqli_error($con));
+$row = mysqli_fetch_array($select_query_result);
+?>
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Users</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+    </head>
+</head>
+<body>
+    <div class="container">
+        <div class="row">
+            <div class="col-lg-12"><h4>User</h4></div>
+        </div>
+        <div class="row">
+            <div class="col-xs-2">ID</div>
+            <div class="col-xs-10"><?php echo $row['id']; ?></div>
+        </div>
+        <div class="row">
+            <div class="col-xs-2">Email</div>
+            <div class="col-xs-10"><?php echo $row['email']; ?></div>
+        </div>
+        <div class="row">
+            <div class="col-xs-2">First Name</div>
+            <div class="col-xs-10"><?php echo $row['first_name']; ?></div>
+        </div>
+    </div>
+</body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/mysqli_fetch_array_with_while_loop.php b/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/mysqli_fetch_array_with_while_loop.php
new file mode 100644
index 0000000..9fed0b2
--- /dev/null
+++ b/Module 4 - PHP/Topic 07 - SELECT Query with PHP (Part II)/Display Data Using HTML & Bootstrap/mysqli_fetch_array_with_while_loop.php	
@@ -0,0 +1,40 @@
+<?php
+$con = mysqli_connect("localhost", "root", "", "ecommerce")or die($mysqli_error($con));
+$select_query = "SELECT  id, email, first_name FROM users";
+$select_query_result = mysqli_query($con, $select_query) or die(mysqli_error($con));
+?>
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Users</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+    </head>
+</head>
+<body>
+    <div class="container">
+        <?php while ($row = mysqli_fetch_array($select_query_result)) { ?>
+          <div class="row">
+              <div class="col-lg-12"><h4>User</h4></div>
+          </div>
+          <div class="row">
+              <div class="col-xs-2">ID</div>
+              <div class="col-xs-10"><?php echo $row['id']; ?></div>
+          </div>
+          <div class="row">
+              <div class="col-xs-2">Email</div>
+              <div class="col-xs-10"><?php echo $row['email']; ?></div>
+          </div>
+          <div class="row">
+              <div class="col-xs-2">First Name</div>
+              <div class="col-xs-10"><?php echo $row['first_name']; ?></div>
+          </div>
+          <hr/>
+        <?php } ?>
+    </div>
+</body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/ReadMe.md b/Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/index.php b/Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/index.php
new file mode 100644
index 0000000..082b9fc
--- /dev/null
+++ b/Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/index.php	
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>User Registration form</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <style>
+            .top_margin{
+                margin-top:20px;
+            }
+        </style>
+    </head>
+</head>
+<body>
+    <div class="container">
+        <div class="row top_margin">
+            <div class="col-xs-6 col-xs-offset-3">
+                <div class="panel panel-primary">
+                    <div class="panel-heading">User Registration</div>
+                    <div class="panel-body">
+                        <form method="POST" action="user_registration_script.php">
+                            <div class="form-group">
+                                <label for="email">Email</label>
+                                <input type="email" class="form-control" id="email" name="email">
+                            </div>
+                            <div class="form-group">
+                                <label for="first_name">First Name</label>
+                                <input type="text" class="form-control" id="first_name" name="first_name">
+                            </div>
+                            <div class="form-group">
+                                <label for="last_name">Last Name</label>
+                                <input type="text" class="form-control" id="last_name" name="last_name">
+                            </div>
+                            <div class="form-group">
+                                <label for="phone">Phone</label>
+                                <input type="number" class="form-control" id="phone" name="phone">
+                            </div>
+                            <button type="submit" class="btn btn-primary" value=”registration_submit”>Submit</button>
+                        </form>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/user_registration_script.php b/Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/user_registration_script.php
new file mode 100644
index 0000000..3bb3073
--- /dev/null
+++ b/Module 4 - PHP/Topic 08 - Form/Inserting Data Using Forms/user_registration_script.php	
@@ -0,0 +1,11 @@
+<?php
+
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+$email = $_POST['email'];
+$first_name = $_POST['first_name'];
+$last_name = $_POST['last_name'];
+$phone = $_POST['phone'];
+$user_registration_query = "insert into users(email, first_name, last_name, phone) values ('$email', '$first_name', '$last_name', '$phone')";
+$user_registration_submit = mysqli_query($con, $user_registration_query) or die(mysqli_error($con));
+echo "User successfully inserted";
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 08 - Form/Security Features/ReadMe.md b/Module 4 - PHP/Topic 08 - Form/Security Features/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 08 - Form/Security Features/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 08 - Form/Security Features/index.php b/Module 4 - PHP/Topic 08 - Form/Security Features/index.php
new file mode 100644
index 0000000..082b9fc
--- /dev/null
+++ b/Module 4 - PHP/Topic 08 - Form/Security Features/index.php	
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>User Registration form</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <style>
+            .top_margin{
+                margin-top:20px;
+            }
+        </style>
+    </head>
+</head>
+<body>
+    <div class="container">
+        <div class="row top_margin">
+            <div class="col-xs-6 col-xs-offset-3">
+                <div class="panel panel-primary">
+                    <div class="panel-heading">User Registration</div>
+                    <div class="panel-body">
+                        <form method="POST" action="user_registration_script.php">
+                            <div class="form-group">
+                                <label for="email">Email</label>
+                                <input type="email" class="form-control" id="email" name="email">
+                            </div>
+                            <div class="form-group">
+                                <label for="first_name">First Name</label>
+                                <input type="text" class="form-control" id="first_name" name="first_name">
+                            </div>
+                            <div class="form-group">
+                                <label for="last_name">Last Name</label>
+                                <input type="text" class="form-control" id="last_name" name="last_name">
+                            </div>
+                            <div class="form-group">
+                                <label for="phone">Phone</label>
+                                <input type="number" class="form-control" id="phone" name="phone">
+                            </div>
+                            <button type="submit" class="btn btn-primary" value=”registration_submit”>Submit</button>
+                        </form>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 08 - Form/Security Features/user_registration_script.php b/Module 4 - PHP/Topic 08 - Form/Security Features/user_registration_script.php
new file mode 100644
index 0000000..ebc1d16
--- /dev/null
+++ b/Module 4 - PHP/Topic 08 - Form/Security Features/user_registration_script.php	
@@ -0,0 +1,12 @@
+<?php
+
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+session_start();
+$email = mysqli_real_escape_string($con, $_POST['email']);
+$first_name = mysqli_real_escape_string($con, $_POST['first_name']);
+$last_name = mysqli_real_escape_string($con, $_POST['last_name']);
+$phone = $_POST['phone'];
+$user_registration_query = "insert into users(email, first_name, last_name, phone) values ('$email', '$first_name', '$last_name', '$phone')";
+$user_registration_submit = mysqli_query($con, $user_registration_query) or die(mysqli_error($con));
+echo "User successfully inserted";
+?>
diff --git a/Module 4 - PHP/Topic 09 - Sessions/Sessions/ReadMe.md b/Module 4 - PHP/Topic 09 - Sessions/Sessions/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 09 - Sessions/Sessions/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 09 - Sessions/Sessions/index.php b/Module 4 - PHP/Topic 09 - Sessions/Sessions/index.php
new file mode 100644
index 0000000..082b9fc
--- /dev/null
+++ b/Module 4 - PHP/Topic 09 - Sessions/Sessions/index.php	
@@ -0,0 +1,50 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>User Registration form</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <style>
+            .top_margin{
+                margin-top:20px;
+            }
+        </style>
+    </head>
+</head>
+<body>
+    <div class="container">
+        <div class="row top_margin">
+            <div class="col-xs-6 col-xs-offset-3">
+                <div class="panel panel-primary">
+                    <div class="panel-heading">User Registration</div>
+                    <div class="panel-body">
+                        <form method="POST" action="user_registration_script.php">
+                            <div class="form-group">
+                                <label for="email">Email</label>
+                                <input type="email" class="form-control" id="email" name="email">
+                            </div>
+                            <div class="form-group">
+                                <label for="first_name">First Name</label>
+                                <input type="text" class="form-control" id="first_name" name="first_name">
+                            </div>
+                            <div class="form-group">
+                                <label for="last_name">Last Name</label>
+                                <input type="text" class="form-control" id="last_name" name="last_name">
+                            </div>
+                            <div class="form-group">
+                                <label for="phone">Phone</label>
+                                <input type="number" class="form-control" id="phone" name="phone">
+                            </div>
+                            <button type="submit" class="btn btn-primary" value=”registration_submit”>Submit</button>
+                        </form>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 09 - Sessions/Sessions/index_with_isset.php b/Module 4 - PHP/Topic 09 - Sessions/Sessions/index_with_isset.php
new file mode 100644
index 0000000..4d1d043
--- /dev/null
+++ b/Module 4 - PHP/Topic 09 - Sessions/Sessions/index_with_isset.php	
@@ -0,0 +1,59 @@
+<?php
+session_start();
+if (isset($_SESSION['id'])) {
+  echo "Hello ".$_SESSION[‘email’];
+} else {
+  echo "Hello Guest";
+}
+?>
+
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>User Registration form</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <style>
+            .top_margin{
+                margin-top:20px;
+            }
+        </style>
+    </head>
+</head>
+<body>
+    <div class="container">
+        <div class="row top_margin">
+            <div class="col-xs-6 col-xs-offset-3">
+                <div class="panel panel-primary">
+                    <div class="panel-heading">User Registration</div>
+                    <div class="panel-body">
+                        <form method="post" action="user_registration_script.php">
+                            <div class="form-group">
+                                <label for="email">Email</label>
+                                <input type="email" class="form-control" id="email" name="email">
+                            </div>
+                            <div class="form-group">
+                                <label for="first_name">First Name</label>
+                                <input type="text" class="form-control" id="first_name" name="first_name">
+                            </div>
+                            <div class="form-group">
+                                <label for="last_name">Last Name</label>
+                                <input type="text" class="form-control" id="last_name" name="last_name">
+                            </div>
+                            <div class="form-group">
+                                <label for="phone">Phone</label>
+                                <input type="number" class="form-control" id="phone" name="phone">
+                            </div>
+                            <button type="submit" class="btn btn-primary">Submit</button>
+                        </form>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 09 - Sessions/Sessions/logout.php b/Module 4 - PHP/Topic 09 - Sessions/Sessions/logout.php
new file mode 100644
index 0000000..c93cfa5
--- /dev/null
+++ b/Module 4 - PHP/Topic 09 - Sessions/Sessions/logout.php	
@@ -0,0 +1,5 @@
+<?php
+session_start();
+session_unset();
+session_destroy();
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 09 - Sessions/Sessions/update_name.php b/Module 4 - PHP/Topic 09 - Sessions/Sessions/update_name.php
new file mode 100644
index 0000000..19b9f6e
--- /dev/null
+++ b/Module 4 - PHP/Topic 09 - Sessions/Sessions/update_name.php	
@@ -0,0 +1,10 @@
+<?php
+
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+session_start();
+$first_name = $_GET['first_name'];
+$user_id = $_SESSION['id'];
+$update_name_query = "UPDATE users SET first_name = '$first_name' WHERE id = '$user_id'";
+$update_name_result = mysqli_query($con, $update_name_query) or die(mysqli_error($con));
+echo "Name updated";
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 09 - Sessions/Sessions/user_registration_script.php b/Module 4 - PHP/Topic 09 - Sessions/Sessions/user_registration_script.php
new file mode 100644
index 0000000..3bf70cf
--- /dev/null
+++ b/Module 4 - PHP/Topic 09 - Sessions/Sessions/user_registration_script.php	
@@ -0,0 +1,14 @@
+<?php
+
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+session_start();
+$email = $_POST['email'];
+$first_name = $_POST['first_name'];
+$last_name = $_POST['last_name'];
+$phone = $_POST['phone'];
+$user_registration_query = "insert into users(email, first_name, last_name, phone) values ('$email', '$first_name', '$last_name', '$phone')";
+$user_registration_submit = mysqli_query($con, $user_registration_query) or die(mysqli_error($con));
+echo "User successfully inserted";
+$_SESSION['email'] = $email;
+$_SESSION['id'] = mysqli_insert_id($con);
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 10 - Basic security/Include/ReadMe.md b/Module 4 - PHP/Topic 10 - Basic security/Include/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 10 - Basic security/Include/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 10 - Basic security/Include/common.php b/Module 4 - PHP/Topic 10 - Basic security/Include/common.php
new file mode 100644
index 0000000..7918d7b
--- /dev/null
+++ b/Module 4 - PHP/Topic 10 - Basic security/Include/common.php	
@@ -0,0 +1,5 @@
+<?php
+
+$con = mysqli_connect("localhost", "root", "", "ecommerce") or die(mysqli_error($con));
+session_start();
+?>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 10 - Basic security/Include/header.php b/Module 4 - PHP/Topic 10 - Basic security/Include/header.php
new file mode 100644
index 0000000..2d1aef9
--- /dev/null
+++ b/Module 4 - PHP/Topic 10 - Basic security/Include/header.php	
@@ -0,0 +1,14 @@
+<nav class="navbar navbar-default"> 
+    <div class="container">
+        <div class="navbar-header">
+            <a class="navbar-brand" href="#">WebSiteName</a>
+        </div>
+        <div>
+            <ul class="nav navbar-nav">
+                <li class="active"><a href="#">Home</a></li>
+                <li><a href="#">Link 1</a></li>
+                <li><a href="#">Link 2</a></li>
+            </ul>
+        </div>
+    </div>
+</nav>
diff --git a/Module 4 - PHP/Topic 10 - Basic security/Include/index-with-common-file.php b/Module 4 - PHP/Topic 10 - Basic security/Include/index-with-common-file.php
new file mode 100644
index 0000000..0d460ce
--- /dev/null
+++ b/Module 4 - PHP/Topic 10 - Basic security/Include/index-with-common-file.php	
@@ -0,0 +1,25 @@
+<?php
+include "common.php";
+?>
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Include Statement</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+    </head>
+    <body>
+        <?php
+        include 'header.php';
+        ?>
+        <div class="container">
+            <div class="row">
+                <h4>Heading</h4>
+            </div>
+        </div>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 10 - Basic security/Include/index-with-include.php b/Module 4 - PHP/Topic 10 - Basic security/Include/index-with-include.php
new file mode 100644
index 0000000..ac3fe96
--- /dev/null
+++ b/Module 4 - PHP/Topic 10 - Basic security/Include/index-with-include.php	
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Include Statement</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+    </head>
+    <body>
+        <?php
+        include 'header.php';
+        ?>
+        <div class="container">
+            <div class="row">
+                <h4>Heading</h4>
+            </div>
+        </div>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 10 - Basic security/Include/index-with-require.php b/Module 4 - PHP/Topic 10 - Basic security/Include/index-with-require.php
new file mode 100644
index 0000000..ddf8a5b
--- /dev/null
+++ b/Module 4 - PHP/Topic 10 - Basic security/Include/index-with-require.php	
@@ -0,0 +1,25 @@
+<?php
+require "com.php";
+?>
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>Include Statement</title>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+    </head>
+    <body>
+        <?php
+        include 'head.php';
+        ?>
+        <div class="container">
+            <div class="row">
+                <h4>Heading</h4>
+            </div>
+        </div>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 10 - Basic security/Security Features/ReadMe.md b/Module 4 - PHP/Topic 10 - Basic security/Security Features/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 10 - Basic security/Security Features/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 10 - Basic security/Security Features/md5.php b/Module 4 - PHP/Topic 10 - Basic security/Security Features/md5.php
new file mode 100644
index 0000000..6ddbcaf
--- /dev/null
+++ b/Module 4 - PHP/Topic 10 - Basic security/Security Features/md5.php	
@@ -0,0 +1,5 @@
+<?php
+
+$str = "Hello";
+echo md5($str);
+?> 
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/ReadMe.md b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/index-_with_error_message.php b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/index-_with_error_message.php
new file mode 100644
index 0000000..a5813b9
--- /dev/null
+++ b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/index-_with_error_message.php	
@@ -0,0 +1,40 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <title>Forms in Bootstrap</title>
+    </head>
+    <body>
+        <div class="container">
+            <center><h4>Front end validations</h4></center>
+            <div class="row">
+                <div class="col-xs-4 col-xs-offset-4">
+                    <div class="panel panel-primary" >
+                        <div class="panel-heading">
+                            <h4>LOGIN</h4>
+                        </div>
+                        <div class="panel-body">
+                            <form action="login_script.php" action="POST">
+                                <div class="form-group">
+                                    <input type="email" class="form-control"  placeholder="Email" name="e-mail" required = "true" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,3}$" >
+                                    <div><?php echo $_GET['email_error']; ?></div>
+                                </div>
+
+                                <div class="form-group">
+                                    <input type="password" class="form-control" placeholder="Password" name="password" required = "true" pattern=".{6,}">
+                                    <div><?php echo $_GET['password_error']; ?></div>
+                                </div>
+                                <button type="submit" name="submit" class="btn btn-primary">Login</button>
+                            </form><br/>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/index.php b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/index.php
new file mode 100644
index 0000000..05b75a6
--- /dev/null
+++ b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/index.php	
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <title>Forms in Bootstrap</title>
+    </head>
+    <body>
+        <div class="container">
+            <center><h4>Front end validations</h4></center>
+            <div class="row">
+                <div class="col-xs-4 col-xs-offset-4">
+                    <div class="panel panel-primary" >
+                        <div class="panel-heading">
+                            <h4>LOGIN</h4>
+                        </div>
+                        <div class="panel-body">
+                            <form action="login_script.php" method="POST">
+                                <div class="form-group">
+                                    <input type="email" class="form-control"  placeholder="Email" name="e-mail" required = "true" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,3}$" >
+                                </div>
+                                <div class="form-group">
+                                    <input type="password" class="form-control" placeholder="Password" name="password" required = "true" pattern=".{6,}">
+                                </div>
+                                <button type="submit" name="submit" class="btn btn-primary">Login</button>
+                            </form><br/>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </body>
+</html>
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/login_script.php b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/login_script.php
new file mode 100644
index 0000000..d69b1c0
--- /dev/null
+++ b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/login_script.php	
@@ -0,0 +1,16 @@
+<?php
+
+require 'common.php';
+$email = $_POST['email'];
+$regex_email = "/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/";
+if (!preg_match($regex_email, $email)) {
+  echo "Incorrect email";
+}
+$password = $_POST['password'];
+if (strlen($password) < 6) {
+  echo "Password should have at-least 6 characters";
+}
+$email = mysqli_real_escape_string($con, $email);
+$password = mysqli_real_escape_string($con, $password);
+
+//use insert query and store the data in the database.
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/login_script_with_header.php b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/login_script_with_header.php
new file mode 100644
index 0000000..4b5f105
--- /dev/null
+++ b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/PHP Validation/login_script_with_header.php	
@@ -0,0 +1,15 @@
+<?php
+
+require 'common.php';
+$email = $_POST['email'];
+$regex_email = "/^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/";
+if (!preg_match($regex_email, $email)) {
+  header('location: index.php?email_error=enter correct email');
+}
+$password = $_POST['password'];
+if (strlen($password) < 6) {
+  header('location: index.php?password_error=enter correct password');
+}
+$email = mysqli_real_escape_string($con, $email);
+$password = mysqli_real_escape_string($con, $password);
+//use insert query and store the data in the database.
\ No newline at end of file
diff --git a/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/Validations/ReadMe.md b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/Validations/ReadMe.md
new file mode 100644
index 0000000..d4fd5b1
--- /dev/null
+++ b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/Validations/ReadMe.md	
@@ -0,0 +1,8 @@
+Steps to open the folder in netbeans: 
+1. Open netbeans.
+2. Click on file in the top menu.
+3. Choose New Project option.
+4. Choose PHP category and in Projects section, choose PHP Application with Existing Source.
+5. For Site Root, browse to the folder where you have extracted these files.
+6. Click on finish.
+7. The folder will open in netbeans.
diff --git a/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/Validations/index.php b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/Validations/index.php
new file mode 100644
index 0000000..758deda
--- /dev/null
+++ b/Module 4 - PHP/Topic 11 - Validations with HTML5_PHP/Validations/index.php	
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" >
+        <!--jQuery library--> 
+        <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
+        <!--Latest compiled and minified JavaScript--> 
+        <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
+        <meta name="viewport" content="width=device-width, initial-scale=1">
+        <title>Forms in Bootstrap</title>
+    </head>
+    <body>
+        <div class="container">
+            <center><h4>Front end validations</h4></center>
+            <div class="row">
+                <div class="col-xs-4 col-xs-offset-4">
+                    <div class="panel panel-primary" >
+                        <div class="panel-heading">
+                            <h4>LOGIN</h4>
+                        </div>
+                        <div class="panel-body">
+                            <form>
+                                <div class="form-group">
+                                    <input type="email" class="form-control"  placeholder="Email" name="e-mail" required = "true" pattern="[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,3}$">
+                                </div>
+                                <div class="form-group">
+                                    <input type="password" class="form-control" placeholder="Password" name="password" required = "true" pattern=".{6,}">
+                                </div>
+                                <button type="submit" name="submit" class="btn btn-primary">Login</button>
+                            </form><br/>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </body>
+</html>
\ No newline at end of file