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<?php $a = ['foo-test' => [1], '-' => [2], 'bar-test' => [3]]; uksort($a, function($x, $y) use (&$a) { if (!isset($a[$x])) { throw new Exception("Key X ('{$x}') not found."); } else {var_dump($x, $a[$x]);} if (!isset($a[$y])) { throw new Exception("Key Y ('{$y}') not found."); } return $x < $y; });
Output for git.master, git.master_jit, rfc.property-hooks
string(8) "foo-test" array(1) { [0]=> int(1) } Deprecated: uksort(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /in/6323h on line 4 string(1) "-" array(1) { [0]=> int(2) } string(1) "-" array(1) { [0]=> int(2) } string(8) "foo-test" array(1) { [0]=> int(1) } string(8) "bar-test" array(1) { [0]=> int(3) }

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