<?php function value_compare_func($a, $b){ // var_dump($a, $b); if ($a === 'n_3') { return 0; } return 1; } $array1 = array("n_1", "n_2", "n_3", "n_4" ); $array2 = array("green"); $result = array_udiff($array1, $array2, "value_compare_func"); print_r($result);
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