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@ 2018-08-08T16:32:09Z

<?php

$list = [
    [
        'name' => 'this is items name',
        'number' =>  1,
        'description' => 'this is description',
        'id' => 'just some id'
    ],
    
     [
         'name' => 'this is items name2',
        'number' =>  1,
        'description' => 'this is description2',
        'id' => 'just some id'
    ],
    
    'test' => [
         'name' => 
         'this is items name3',
        'number' =>  1,
        'description' => 'do not find this one',
        'id' => 'just some id'
    ],
    'preserve_this_key_please' => [
         'name' => 
         'this is items name4',
        'number' =>  1,
        'description' => 'this is something, key preserved',
        'id' => 'just some id'
    ],    
];
function getKeysBy($array, $key, $value){
    return array_keys(array_filter($array,function($val) use ($key,$value) {
        //return $val[$key] === $value;//exact match
        return strpos($val[$key], $value) === 0;
    } ));
}
var_dump(getKeysBy($list, 'description', 'this is'));

Output for 7.1.0 - 7.1.33, 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 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: array(3) { [0]=> int(0) [1]=> int(1) [2]=> string(24) "preserve_this_key_please" }
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(3) { [0]=> int(0) [1]=> int(1) [2]=> string(24) "preserve_this_key_please" }

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176.46 ms | 402 KiB | 196 Q