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run code in 300+ PHP versions simultaneously

@ 2020-09-30T13:21:47Z

<?php

$array = [
    [
        'id' => 1,
        'some_key' => 'some_value',
        'attribute' => [
            'id' => 45,
            'cat_id' => 1
        ],
        'sub' => [
            'id' => 17,
            'some_key' => 'some_value',
            'attribute' => [
                'id' => 47,
                'cat_id' => 17
            ],
        ],
    ],
    [
        'id' => 2,
        'some_key' => 'some_value',
        'sub' => [
            'id' => 19,
            'some_key' => 'some_value',
        ],
    ]
];

$childArray = [];

function collectIDs($arr,&$childArray){
  foreach($arr as $key => $value){
    if($key === 'attribute') continue;
    if(is_array($value)) collectIDs($value,$childArray);
    else if($key == 'id') $childArray[] = $value;
  }
}

collectIDs($array,$childArray);
print_r($childArray);

Output for 7.2.0 - 7.2.33, 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 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7: Array ( [0] => 1 [1] => 17 [2] => 2 [3] => 19 )
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 Array ( [0] => 1 [1] => 17 [2] => 2 [3] => 19 )

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