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run code in 300+ PHP versions simultaneously
<?php $c[] = 'Hello'; $a = ["You","are","here"]; $b[] = 'Hello'; $a = array_merge($a, $b); print_r($a); print_r($b); print_r($c);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.5 - 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 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Array ( [0] => You [1] => are [2] => here [3] => Hello ) Array ( [0] => Hello ) Array ( [0] => Hello )
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] => You [1] => are [2] => here [3] => Hello ) Array ( [0] => Hello ) Array ( [0] => Hello )

preferences:
156.29 ms | 402 KiB | 198 Q