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<?php class myClass { private $a = [ 'foo-test' => [1], '-' => [2], 'bar-test' => [3] ]; private function _mySort($x, $y) { if (!isset($this->a[$x])) { throw new Exception('Missing X: "' . $x . '"'); } if (!isset($this->a[$y])) { throw new Exception('Missing Y: "' . $y . '"'); } return $x < $y; } public function __construct() { uksort($this->a, [$this, '_mySort']); } } // new myClass(); $a = ['foo-test' => [1], '-' => [2], 'bar-test' => [3]]; uksort($a, function($x, $y) { if (!isset($a[$x])) { throw new Exception('Missing X: "' . $x . '"'); } if (!isset($a[$y])) { throw new Exception('Missing Y: "' . $y . '"'); } return $x < $y; });
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Exception: Missing X: "foo-test" in /in/eEMnQ:36 Stack trace: #0 [internal function]: {closure}('foo-test', '-') #1 /in/eEMnQ(34): uksort(Array, Object(Closure)) #2 {main} thrown in /in/eEMnQ on line 36
Process exited with code 255.
Output for 7.0.0 - 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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Fatal error: Uncaught Exception: Missing X: "foo-test" in /in/eEMnQ:36 Stack trace: #0 [internal function]: {closure}('foo-test', '-') #1 /in/eEMnQ(44): uksort(Array, Object(Closure)) #2 {main} thrown in /in/eEMnQ on line 36
Process exited with code 255.
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/eEMnQ on line 44 Fatal error: Uncaught exception 'Exception' with message 'Missing X: "-"' in /in/eEMnQ:36 Stack trace: #0 [internal function]: {closure}('-', 'foo-test') #1 /in/eEMnQ(44): uksort(Array, Object(Closure)) #2 {main} thrown in /in/eEMnQ on line 36
Process exited with code 255.
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