PHP Classes

File: test/84_array_find_key.php

Recommend this page to a friend!
  Classes of ASCOOS CMS   PHP Backwards Compatibility Library   test/84_array_find_key.php   Download  
File: test/84_array_find_key.php
Role: Example script
Content type: text/plain
Description: Returns the KEY of the first element from $array for which the $callback returns TRUE. If no matching element is found the function returns NULL.
Class: PHP Backwards Compatibility Library
Functions of newer PHP versions for older versions
Author: By
Last change: Updated to 1.1.3
Date: 1 month ago
Size: 2,038 bytes
 

Contents

Class file image Download
<?php
/**
 * __ _ ___ ___ ___ ___ ___ ____ _ __ ___ ___
 * / _` |/ / / __/ _ \ / _ \ / / / __/| '_ ` _ \ / /
 * | (_| |\ \| (_| (_) | (_) |\ \ | (__ | | | | | |\ \
 * \__,_|/__/ \___\___/ \___/ /__/ \___\|_| |_| |_|/__/
 *
 *
 *************************************************************************************
 * @ASCOOS-NAME : ASCOOS CMS 24' *
 * @ASCOOS-VERSION : 24.0.0 *
 * @ASCOOS-CATEGORY : Kernel (Frontend and Administration Side) *
 * @ASCOOS-CREATOR : Drogidis Christos *
 * @ASCOOS-SITE : www.ascoos.com *
 * @ASCOOS-LICENSE : [Commercial] http://docs.ascoos.com/lics/ascoos/AGL-F.html *
 * @ASCOOS-COPYRIGHT : Copyright (c) 2007 - 2024, AlexSoft Software. *
 *************************************************************************************
 *
 * @package : ASCOOS CMS - phpBCL
 * @subpackage : Example array_find_key Function
 * @source : /phpBCL/test/84_array_find_key.php
 * @version : 1.1.3
 * @created : 2024-10-04 07:00:00 UTC+3
 * @updated : 2024-10-22 07:00:00 UTC+3
 * @author : Drogidis Christos
 * @authorSite : www.alexsoft.gr
 *
 * @since 5.6.40
 */



require_once("../autoload.php");

function is_even($value)
{
    return $value % 2 === 0;
}

function is_key_numeric($value, $key)
{
    return is_numeric($key);
}

// Since PHP >= 5.6
echo array_find_key(['foo' => 1, 'bar' => 2, 'baz' => 3], 'is_even').'<br>'; // "bar"
echo array_find_key(['a' => 'foo', 2 => 'bar'], 'is_key_numeric').'<br>'; // "2"
/*
// Since PHP >= 7.4
if (version_compare(PHP_VERSION, '7.4.0', '>=')) {
    array_find_key(['foo' => 1, 'bar' => 2, 'baz' => 3], fn($value) => $value % 2 === 0); // "bar"
}
*/
?>