Online PHP editor | output for fekWt

@ 2021-06-06T06:11:05Z

<?php

$a = 'a';
$b = '3';

$x = [];

$contains_key = 
    /**
     * @param array<string, string> $arr
     * @param string $key
     */
    function(array $arr, string $key): bool {
        foreach($arr as $k => $_v) {
            if ($k === $key) {
                return true;
            }
        }
    
        return false;
    };
    
    
var_dump($contains_key($x, $a));
$x[$a] = 'yes';
var_dump($contains_key($x, $a));


var_dump($contains_key($x, $b));
$x[$b] = 'yes';
var_dump($contains_key($x, $b));

Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: bool(false) bool(true) bool(false) bool(false)
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 bool(false) bool(true) bool(false) bool(false)

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