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<?php $a = ['foo-test' => [1], '-' => [2], 'bar-test' => [3]]; uksort($a, function($x, $y) use (&$a) { var_dump($a); if (!isset($a[$x])) { throw new Exception("Key '{$x}' not found."); } if (!isset($a[$y])) { throw new Exception("Key '{$y}' not found."); } return $x < $y; });
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { ["foo-test"]=> array(1) { [0]=> int(1) } ["-"]=> array(1) { [0]=> int(2) } ["bar-test"]=> array(1) { [0]=> int(3) } } Deprecated: uksort(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /in/ZKA13 on line 4 array(3) { ["foo-test"]=> array(1) { [0]=> int(1) } ["-"]=> array(1) { [0]=> int(2) } ["bar-test"]=> array(1) { [0]=> int(3) } } array(3) { ["foo-test"]=> array(1) { [0]=> int(1) } ["-"]=> array(1) { [0]=> int(2) } ["bar-test"]=> array(1) { [0]=> int(3) } } array(3) { ["foo-test"]=> array(1) { [0]=> int(1) } ["-"]=> array(1) { [0]=> int(2) } ["bar-test"]=> array(1) { [0]=> int(3) } } array(3) { ["foo-test"]=> array(1) { [0]=> int(1) } ["-"]=> array(1) { [0]=> int(2) } ["bar-test"]=> array(1) { [0]=> int(3) } }

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