3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $one = "hallo"; $two = "goodbye"; echo count_chars("$one$two");
Output for 5.4.0 - 7.1.0
Notice: Array to string conversion in /in/Nqb9e on line 4 Array
Output for 4.3.0 - 5.3.29
Array