<?php
if (defined('HHVM_VERSION')) {
exit('*HHVM skipped*');
}
// The following line will emit some error if key()'s argument cannot be passed by value
var_dump(key(array_flip(array('foo' => 'bar'))));
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
string(3) "bar"
Output for 5.0.5
Fatal error: Only variables can be passed by reference in /in/BPuff on line 8
Process exited with code 255.