3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = [ 'a' => 2, 'z' => 2, 'd' => 1 ]; $allowlist = ['a', 'd']; uksort( $array, fn($a, $b) => [$array[$b], in_array($b, $allowlist)] <=> [$array[$a], in_array($a, $allowlist)] ); var_export($array);
Output for 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
array ( 'a' => 2, 'z' => 2, 'd' => 1, )
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 ( 'a' => 2, 'z' => 2, 'd' => 1, )
Output for 7.3.0 - 7.3.33
Parse error: syntax error, unexpected '=>' (T_DOUBLE_ARROW), expecting ')' in /in/hETJR on line 12
Process exited with code 255.
preferences:
161.15 ms | 401 KiB | 156 Q