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<?php $a = ['foo-test' => [1], '-' => [2], 'bar-test' => [3]]; uksort($a, function($x, $y) use (&$a) { echo $x, PHP_EOL; // var_dump($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 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
foo-test Deprecated: uksort(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /in/7DGl2 on line 4 - - foo-test bar-test
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
foo-test Deprecated: uksort(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /in/7DGl2 on line 16 - - foo-test bar-test
Output for 7.0.6 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
foo-test - foo-test
Output for 7.0.0 - 7.0.5
foo-test - foo-test Fatal error: Uncaught Exception: Key 'bar-test' not found. in /in/7DGl2:12 Stack trace: #0 [internal function]: {closure}('foo-test', 'bar-test') #1 /in/7DGl2(16): uksort(Array, Object(Closure)) #2 {main} thrown in /in/7DGl2 on line 12
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
- bar-test foo-test Warning: uksort(): Array was modified by the user comparison function in /in/7DGl2 on line 16
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