my-sql-export (backup) database.php

<?php
/* 
##### EXAMPLE #####
   EXPORT_DATABASE("localhost","user","pass","db_name" ); 
   
##### Notes #####
     * (optional) 5th parameter: to backup specific tables only,like: array("mytable1","mytable2",...)   
     * (optional) 6th parameter: backup filename (otherwise, it creates random name)
     * IMPORTANT NOTE ! Many people replaces strings in SQL file, which is not recommended. READ THIS:  http://puvox.software/tools/wordpress-migrator
     * If you need, you can check "import.php" too
*/

// by https://github.com/ttodua/useful-php-scripts //
function EXPORT_DATABASE($host,$user,$pass,$name,       $tables=false, $backup_name=false)
{ 
	set_time_limit(3000); $mysqli = new mysqli($host,$user,$pass,$name); $mysqli->select_db($name); $mysqli->query("SET NAMES 'utf8'");
	$queryTables = $mysqli->query('SHOW TABLES'); while($row = $queryTables->fetch_row()) { $target_tables[] = $row[0]; }	if($tables !== false) { $target_tables = array_intersect( $target_tables, $tables); } 
	$content = "SET SQL_MODE = \"NO_AUTO_VALUE_ON_ZERO\";\r\nSET time_zone = \"+00:00\";\r\n\r\n\r\n/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;\r\n/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;\r\n/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;\r\n/*!40101 SET NAMES utf8 */;\r\n--\r\n-- Database: `".$name."`\r\n--\r\n\r\n\r\n";
	foreach($target_tables as $table){
		if (empty($table)){ continue; } 
		$result	= $mysqli->query('SELECT * FROM `'.$table.'`');  	$fields_amount=$result->field_count;  $rows_num=$mysqli->affected_rows; 	$res = $mysqli->query('SHOW CREATE TABLE '.$table);	$TableMLine=$res->fetch_row(); 
		$content .= "\n\n".$TableMLine[1].";\n\n";   $TableMLine[1]=str_ireplace('CREATE TABLE `','CREATE TABLE IF NOT EXISTS `',$TableMLine[1]);
		for ($i = 0, $st_counter = 0; $i < $fields_amount;   $i++, $st_counter=0) {
			while($row = $result->fetch_row())	{ //when started (and every after 100 command cycle):
				if ($st_counter%100 == 0 || $st_counter == 0 )	{$content .= "\nINSERT INTO ".$table." VALUES";}
					$content .= "\n(";    for($j=0; $j<$fields_amount; $j++){ $row[$j] = str_replace("\n","\\n", addslashes($row[$j]) ); if (isset($row[$j])){$content .= '"'.$row[$j].'"' ;}  else{$content .= '""';}	   if ($j<($fields_amount-1)){$content.= ',';}   }        $content .=")";
				//every after 100 command cycle [or at last line] ....p.s. but should be inserted 1 cycle eariler
				if ( (($st_counter+1)%100==0 && $st_counter!=0) || $st_counter+1==$rows_num) {$content .= ";";} else {$content .= ",";}	$st_counter=$st_counter+1;
			}
		} $content .="\n\n\n";
	}
	$content .= "\r\n\r\n/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;\r\n/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;\r\n/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;";
	$backup_name = $backup_name ? $backup_name : $name.'___('.date('H-i-s').'_'.date('d-m-Y').').sql';
	ob_get_clean(); header('Content-Type: application/octet-stream');  header("Content-Transfer-Encoding: Binary");  header('Content-Length: '. (function_exists('mb_strlen') ? mb_strlen($content, '8bit'): strlen($content)) );    header("Content-disposition: attachment; filename=\"".$backup_name."\""); 
	echo $content; exit;
}
?>