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<?php class myClass { private $a = [ 'foo-test' => [1], '-' => [2], 'bar-test' => [3] ]; private function _mySort($x, $y) { print_r($this->a); if (!isset($this->a[$x])) { throw new Exception('Missing X: "' . $x . '"'); } if (!isset($this->a[$y])) { throw new Exception('Missing Y: "' . $y . '"'); } return strcmp($x, $y); } public function __construct() { uksort($this->a, [$this, '_mySort']); } } new myClass();
Output for 7.0.6 - 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Array ( [foo-test] => Array ( [0] => 1 ) [-] => Array ( [0] => 2 ) [bar-test] => Array ( [0] => 3 ) ) Array ( [foo-test] => Array ( [0] => 1 ) [-] => Array ( [0] => 2 ) [bar-test] => Array ( [0] => 3 ) ) Array ( [foo-test] => Array ( [0] => 1 ) [-] => Array ( [0] => 2 ) [bar-test] => Array ( [0] => 3 ) )
Output for 7.0.0 - 7.0.5
Array ( [foo-test] => Array ( [0] => 1 ) [-] => Array ( [0] => 2 ) [bar-test] => Array ( [0] => 3 ) ) Array ( [foo-test] => Array ( [0] => 1 ) [-] => Array ( [0] => 2 ) [bar-test] => Array ( [0] => 3 ) ) Array ( [-] => Array ( [0] => 2 ) [foo-test] => Array ( [0] => 1 ) [bar-test] => Array ( [0] => 3 ) ) Fatal error: Uncaught Exception: Missing X: "foo-test" in /in/hY825:15 Stack trace: #0 [internal function]: myClass->_mySort('foo-test', 'bar-test') #1 /in/hY825(27): uksort(Array, Array) #2 /in/hY825(31): myClass->__construct() #3 {main} thrown in /in/hY825 on line 15
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Array ( [foo-test] => Array ( [0] => 1 ) [-] => Array ( [0] => 2 ) [bar-test] => Array ( [0] => 3 ) ) Array ( [foo-test] => Array ( [0] => 1 ) [-] => Array ( [0] => 2 ) [bar-test] => Array ( [0] => 3 ) ) Array ( [foo-test] => Array ( [0] => 1 ) [-] => Array ( [0] => 2 ) [bar-test] => Array ( [0] => 3 ) ) Array ( [foo-test] => Array ( [0] => 1 ) [-] => Array ( [0] => 2 ) [bar-test] => Array ( [0] => 3 ) )

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