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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 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
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) } }
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 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) } }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
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 15 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) } }
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
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) } }
Output for 7.0.0 - 7.0.5
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) } ["bar-test"]=> array(1) { [0]=> int(3) } ["-"]=> array(1) { [0]=> int(2) } } Fatal error: Uncaught Exception: Key 'bar-test' not found. in /in/ZKA13:11 Stack trace: #0 [internal function]: {closure}('foo-test', 'bar-test') #1 /in/ZKA13(15): uksort(Array, Object(Closure)) #2 {main} thrown in /in/ZKA13 on line 11
Process exited with code 255.
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
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) } } Warning: uksort(): Array was modified by the user comparison function in /in/ZKA13 on line 15

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