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@ 2025-01-18T12:28:52Z

<?php

$array = [
    'documents' => ['application/pdf','application/x-pdf'],
    'images'    => ['image/cgm','image/g3fax'],
    'videos'    => ['video/dl','video/fli','video/gl','video/mpeg'],    
];

$find = 'image/g3fax';

var_export(
    array_find_key(
        $array,
        fn($row) => in_array($find, $row)
    )
);

Output
Performance
VLD
References
Branches

var_export: documentation ( source)
in_array: documentation ( source)

preferences:dark modelive previewkey bindings

28.58 ms | 405 KiB | 5 Q