3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Tag {}; $setTags = []; function setTags(array $tags, &$setTags) { array_map( function (Tag $tag) { $setTags[] = $tag; }, $tags ); } var_dump($setTags); setTags( [ new Tag(), new Tag(), new Tag(), new Tag(), ], $setTags ); var_dump($setTags);
Output for 5.6.0 - 5.6.26, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
array(0) { } array(0) { }
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(0) { } array(0) { }

preferences:
168.62 ms | 402 KiB | 189 Q