3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ "21-07-2017" => ['a'], "04-09-2017" => ['b'], "27-07-2017" => ['c'], "31-07-2017" => ['d'], "01-08-2017" => ['e'], "05-09-2017" => ['f'], "15-09-2017" => ['g'], ]; uksort($array, function($a, $b) { return strtotime($a) <=> strtotime($b);}); var_export($array);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.4, 8.3.6 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array ( '21-07-2017' => array ( 0 => 'a', ), '27-07-2017' => array ( 0 => 'c', ), '31-07-2017' => array ( 0 => 'd', ), '01-08-2017' => array ( 0 => 'e', ), '04-09-2017' => array ( 0 => 'b', ), '05-09-2017' => array ( 0 => 'f', ), '15-09-2017' => array ( 0 => 'g', ), )
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 ( '21-07-2017' => array ( 0 => 'a', ), '27-07-2017' => array ( 0 => 'c', ), '31-07-2017' => array ( 0 => 'd', ), '01-08-2017' => array ( 0 => 'e', ), '04-09-2017' => array ( 0 => 'b', ), '05-09-2017' => array ( 0 => 'f', ), '15-09-2017' => array ( 0 => 'g', ), )
Output for 5.3.29
Parse error: syntax error, unexpected '[' in /in/S8F4D on line 3
Process exited with code 255.

preferences:
122.61 ms | 1437 KiB | 4 Q