functions.php

<?php
declare(strict_types=1);

use JetBrains\PhpStorm\NoReturn;

include __DIR__.'/vendor/autoload.php';
date_default_timezone_set('Africa/Cairo');

/** new return type added in php 8.1 called never */

function welcomeToNeverReturnType():never
{
    die('never return');
}

//welcomeToNeverReturnType();

/** Splat Operator */
function sum(int...$numbers): int
{
    return array_sum($numbers);
}

echo sum(100, 100, 100, 100) . PHP_EOL;


function sum_two(int $param, int...$numbers): int
{
    return array_sum($numbers) + $param;
}

echo sum_two(200, 100, 100, 100) . PHP_EOL;

if (!function_exists('sum_three')) {
    function sum_three(...$numbers): int
    {
        return array_sum($numbers);
    }
}

echo sum_three(10, 20, 20) . "<br>";

/** anonymous function */
$arrowFunction = fn(int...$numbers): int => array_sum($numbers);
echo $arrowFunction(1, 1, 1) . "<br>";

$random = mt_rand(1, 100);
$anonymousFunction = function (int...$numbers) use (&$random) {
    $random = 'random';
    return array_sum($numbers) . ' random is ' . $random;
};
echo $anonymousFunction(2, 2, 2) . "<br>";
echo "random value is : $random" . "<br>";

/** function named arguments */

function named_argument(string $first_name, string $last_name): string
{
    return $first_name . ' ' . $last_name . "<br>";
}

echo named_argument(last_name: 'karam', first_name: 'abdullah') . "<br>";

/** nested callable with splat operator in php */

function callableTest(callable $callable, array...$characters): string
{
    return call_user_func($callable, $characters);
}

$userNameCharacters = ['a', 'b', 'd', 'u', 'l', 'l', 'a', 'h'];

/** result :  (abdullah) */

echo callableTest(function ($characters) {
    return implode('', $characters[0]) . "<br>";
}, $userNameCharacters);

/** try named arguments with built-in function in php */

$cookieValues = [
    'name' => 'foo',
    'value' => 'bar',
    'httponly' => true
];

function setCookieA(array $values): bool
{
    return setcookie(name: $values['name'], value: $values['value'], httponly: $values['httponly']);
}

var_dump(setCookieA($cookieValues) . "<br>");


/** array map with anonymous function  */

$arr = [1, 2, 3, 4, 5, 6];
$result = array_map(fn($number): int => ($number < 1) ? $number * 2 : $number, $arr);
echo "<pre>";
var_dump($result);


function recursion($number)
{
    if ($number <= 10) {
        echo "$number <br/>";
        recursion($number + 1);
    }
}

$start_time = hrtime(true);
recursion(1);
$end_time = hrtime(true);
echo number_format(($end_time - $start_time) / 1000,1);


$start_time2 = hrtime(true);
for ($i=1;$i <= 10;$i++){
    echo "$i <br/>";
}
$end_time2 = hrtime(true);
echo number_format(($end_time2 - $start_time2) / 1000,1);

echo PHP_EOL;
function random()
{
    $randomNumber = mt_rand(0, 9);
    if ($randomNumber != 9) {
        echo "not equal ".$randomNumber;
        return;
    }
    echo "not equal 9" . PHP_EOL;
    random();
}
random();