3v4l.org

run code in 300+ PHP versions simultaneously
<?php function uasort_key(&$arr, $func) { return uksort($arr, function($a,$b) use(&$arr,$func) { return $func($arr[$a], $arr[$b], $a, $b); }); } function sort_me($a, $b, $ka = 0, $kb = 0) { return ($a < $b ? -1 : ($a > $b ? 1 : ($ka < $kb ? -1 : ($ka > $kb ? 1 : 0)) )); } $test_array = array(4,6,2,1,7,5,1,34,1,0,4); $test_array_uasort = $test_array; $test_array_uasort_key = $test_array; uasort($test_array_uasort, 'sort_me'); uasort_key($test_array_uasort_key, 'sort_me'); echo 'Unsorted: '; print_r($test_array); echo 'uasort: '; print_r($test_array_uasort); echo 'uasort_key: '; print_r($test_array_uasort_key);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Unsorted: Array ( [0] => 4 [1] => 6 [2] => 2 [3] => 1 [4] => 7 [5] => 5 [6] => 1 [7] => 34 [8] => 1 [9] => 0 [10] => 4 ) uasort: Array ( [9] => 0 [3] => 1 [6] => 1 [8] => 1 [2] => 2 [0] => 4 [10] => 4 [5] => 5 [1] => 6 [4] => 7 [7] => 34 ) uasort_key: Array ( [9] => 0 [3] => 1 [6] => 1 [8] => 1 [2] => 2 [0] => 4 [10] => 4 [5] => 5 [1] => 6 [4] => 7 [7] => 34 )
Output for 7.0.6 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Unsorted: Array ( [0] => 4 [1] => 6 [2] => 2 [3] => 1 [4] => 7 [5] => 5 [6] => 1 [7] => 34 [8] => 1 [9] => 0 [10] => 4 ) uasort: Array ( [9] => 0 [6] => 1 [3] => 1 [8] => 1 [2] => 2 [0] => 4 [10] => 4 [5] => 5 [1] => 6 [4] => 7 [7] => 34 ) uasort_key: Array ( [9] => 0 [3] => 1 [6] => 1 [8] => 1 [2] => 2 [0] => 4 [10] => 4 [5] => 5 [1] => 6 [4] => 7 [7] => 34 )
Output for 7.0.0 - 7.0.5
Unsorted: Array ( [0] => 4 [1] => 6 [2] => 2 [3] => 1 [4] => 7 [5] => 5 [6] => 1 [7] => 34 [8] => 1 [9] => 0 [10] => 4 ) uasort: Array ( [9] => 0 [6] => 1 [3] => 1 [8] => 1 [2] => 2 [0] => 4 [10] => 4 [5] => 5 [1] => 6 [4] => 7 [7] => 34 ) uasort_key: Array ( [9] => 0 [6] => 1 [3] => 1 [2] => 2 [0] => 4 [1] => 6 [10] => 4 [8] => 1 [5] => 5 [4] => 7 [7] => 34 )
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Warning: uksort(): Array was modified by the user comparison function in /in/WRM5S on line 6 Unsorted: Array ( [0] => 4 [1] => 6 [2] => 2 [3] => 1 [4] => 7 [5] => 5 [6] => 1 [7] => 34 [8] => 1 [9] => 0 [10] => 4 ) uasort: Array ( [9] => 0 [6] => 1 [8] => 1 [3] => 1 [2] => 2 [10] => 4 [0] => 4 [5] => 5 [1] => 6 [4] => 7 [7] => 34 ) uasort_key: Array ( [9] => 0 [3] => 1 [6] => 1 [8] => 1 [2] => 2 [0] => 4 [10] => 4 [5] => 5 [1] => 6 [4] => 7 [7] => 34 )

preferences:
272.81 ms | 402 KiB | 326 Q