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<?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_key = $test_array; uasort_key($test_array_uasort_key, 'sort_me'); print_r($test_array_uasort_key);
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 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 - 8.3.4, 8.3.6
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 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [9] => 0 [3] => 1 [6] => 1 [8] => 1 [2] => 2 [0] => 4 [10] => 4 [5] => 5 [1] => 6 [4] => 7 [7] => 34 )

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