3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 1; $x = 2; function test() { global $a; global $x; $GLOBALS['a'] = &$x; $x = 5; echo $a . PHP_EOL; echo $x . PHP_EOL; } test(); echo PHP_EOL; echo $a . PHP_EOL; // $a is 1 here instead of 5 echo $x . PHP_EOL; $a = &$x; echo PHP_EOL; echo $a . PHP_EOL; echo $x . PHP_EOL;
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
1 5 5 5 5 5
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 1 5 5 5 5 5
preferences:
173.85 ms | 402 KiB | 182 Q