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<?php function compare($a, $b) { $ret = value_compare_func($a, $b); echo "value_compare_func($a, $b) == $ret\n"; return $ret; } function value_compare_func($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, $array2, "compare"); print_r($result);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 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 - 8.3.6
value_compare_func(n_1, n_2) == 1 value_compare_func(n_3, n_2) == 0 value_compare_func(n_1, n_4) == 1 value_compare_func(n_2, n_4) == 1 value_compare_func(n_3, n_4) == 0 value_compare_func(n_3, green) == 0 value_compare_func(n_3, n_4) == 0 value_compare_func(n_4, n_2) == 1 value_compare_func(n_2, n_1) == 1 Array ( [0] => n_1 [1] => n_2 )
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
value_compare_func(n_2, n_1) == 1 value_compare_func(n_2, n_3) == 1 value_compare_func(n_4, n_2) == 1 value_compare_func(n_1, n_3) == 1 value_compare_func(n_3, green) == 0 value_compare_func(n_3, n_1) == 0 value_compare_func(n_1, n_2) == 1 value_compare_func(n_2, n_4) == 1 Array ( [1] => n_2 [3] => n_4 )
preferences:
208.96 ms | 403 KiB | 228 Q