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<?php $ar = ['a', 'b', 'a', 'c']; uasort($ar, function($a, $b){ if ($a > $b) { return 1; } if ($a < $b) { return -1; } return 0; }); print_r($ar); echo PHP_EOL; uasort($ar, function($a, $b){ return strcasecmp($a, $b); }); print_r($ar); echo PHP_EOL; uasort($ar, function($a, $b){ return strcomp($a, $b); }); print_r($ar);
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Array ( [0] => a [2] => a [1] => b [3] => c ) Array ( [0] => a [2] => a [1] => b [3] => c ) Fatal error: Uncaught Error: Call to undefined function strcomp() in /in/Vc7rP:23 Stack trace: #0 [internal function]: {closure}('a', 'a') #1 /in/Vc7rP(22): uasort(Array, Object(Closure)) #2 {main} thrown in /in/Vc7rP on line 23
Process exited with code 255.
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 ( [0] => a [2] => a [1] => b [3] => c ) Array ( [0] => a [2] => a [1] => b [3] => c ) Fatal error: Uncaught Error: Call to undefined function strcomp() in /in/Vc7rP:23 Stack trace: #0 [internal function]: {closure}('a', 'a') #1 /in/Vc7rP(22): uasort(Array, Object(Closure)) #2 {main} thrown in /in/Vc7rP on line 23
Process exited with code 255.
Output for 7.3.24 - 7.3.33, 7.4.12 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Array ( [0] => a [2] => a [1] => b [3] => c ) Array ( [0] => a [2] => a [1] => b [3] => c ) Fatal error: Uncaught Error: Call to undefined function strcomp() in /in/Vc7rP:23 Stack trace: #0 [internal function]: {closure}('a', 'a') #1 /in/Vc7rP(24): uasort(Array, Object(Closure)) #2 {main} thrown in /in/Vc7rP on line 23
Process exited with code 255.
Output for 5.6.38
Array ( [0] => a [2] => a [1] => b [3] => c ) Array ( [0] => a [2] => a [1] => b [3] => c ) Fatal error: Call to undefined function strcomp() in /in/Vc7rP on line 23
Process exited with code 255.

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