3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(array(1,2) . array(3,4));
based on KX1nC
Output for 5.4.0 - 7.1.0
Notice: Array to string conversion in /in/289li on line 3 Notice: Array to string conversion in /in/289li on line 3 string(10) "ArrayArray"
Output for 4.3.0 - 5.3.29
string(10) "ArrayArray"