3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function createMultiKeyCmpFunc($cmp, $key /* , keys... */) { $keys = func_get_args(); array_shift($keys); return function (array $a, array $b) use ($cmp, $keys) { return array_reduce($keys, function ($result, $key) use ($cmp, $a, $b) { return $result ?: call_user_func($cmp, $a[$key], $b[$key]); }); }; } $array = [ ['foo' => 4, 'bar' => 2, 'baz' => 3], ['foo' => 4, 'bar' => 3, 'baz' => 3], ['foo' => 3, 'bar' => 2, 'baz' => 3], ['foo' => 4, 'bar' => 1, 'baz' => 6], ['foo' => 3, 'bar' => 2, 'baz' => 3], ['foo' => 1, 'bar' => 4, 'baz' => 3], ['foo' => 2, 'bar' => 2, 'baz' => 1], ['foo' => 6, 'bar' => 6, 'baz' => 8], ['foo' => 6, 'bar' => 2, 'baz' => 3], ['foo' => 3, 'bar' => 1, 'baz' => 5], ['foo' => 4, 'bar' => 2, 'baz' => 3], ]; usort($array, createMultiKeyCmpFunc('strcmp', 'foo', 'bar', 'baz')); var_dump($array);
Output for 5.4.0 - 7.1.0
array(11) { [0]=> array(3) { ["foo"]=> int(1) ["bar"]=> int(4) ["baz"]=> int(3) } [1]=> array(3) { ["foo"]=> int(2) ["bar"]=> int(2) ["baz"]=> int(1) } [2]=> array(3) { ["foo"]=> int(3) ["bar"]=> int(1) ["baz"]=> int(5) } [3]=> array(3) { ["foo"]=> int(3) ["bar"]=> int(2) ["baz"]=> int(3) } [4]=> array(3) { ["foo"]=> int(3) ["bar"]=> int(2) ["baz"]=> int(3) } [5]=> array(3) { ["foo"]=> int(4) ["bar"]=> int(1) ["baz"]=> int(6) } [6]=> array(3) { ["foo"]=> int(4) ["bar"]=> int(2) ["baz"]=> int(3) } [7]=> array(3) { ["foo"]=> int(4) ["bar"]=> int(2) ["baz"]=> int(3) } [8]=> array(3) { ["foo"]=> int(4) ["bar"]=> int(3) ["baz"]=> int(3) } [9]=> array(3) { ["foo"]=> int(6) ["bar"]=> int(2) ["baz"]=> int(3) } [10]=> array(3) { ["foo"]=> int(6) ["bar"]=> int(6) ["baz"]=> int(8) } }
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/rRFJ9 on line 14
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/rRFJ9 on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/rRFJ9 on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/rRFJ9 on line 7
Process exited with code 255.