3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(strtolower(array()));
Output for 5.3.0 - 7.1.0
Warning: strtolower() expects parameter 1 to be string, array given in /in/N1HQv on line 3 NULL
Output for 4.3.0 - 5.2.17
Notice: Array to string conversion in /in/N1HQv on line 3 string(5) "array"