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run code in 300+ PHP versions simultaneously
<?php $array1 = array(new stdClass, new stdClass, new stdClass); $array2 = array(0, 1, 2); $compareFunction = function($a, $b) { if ($a == $b) { return 0; } elseif ($a > $b) { return 1; } else { return -1; } }; var_dump(array_udiff($array1, $array1, $compareFunction), array_udiff($array2, $array2, $compareFunction));

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