3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 1; $b = [&$a]; $c = $b; unset($a); // <-- $b[0] = 2; echo "$b[0] $c[0]";
Output for 8.0.8, 8.1.23 - 8.1.31, 8.2.10 - 8.2.27, 8.3.0 - 8.3.4, 8.3.6 - 8.3.15, 8.4.1 - 8.4.2
2 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 2 1

preferences:
71.14 ms | 407 KiB | 5 Q