3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr1 = ['test' => 'test', 'yup' => 'nope', 'dick' => 'fart']; $arr2 = ['test', 'yup', 'yolo']; $diff = array_diff(array_keys($arr1), $arr2); var_dump($diff);

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53.79 ms | 402 KiB | 5 Q