3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo substr(null, 0, 2); echo substr(null, -4); echo substr(array(), 0, 2);
Output for 5.3.0 - 7.2.0
Warning: substr() expects parameter 1 to be string, array given in /in/oj6cC on line 5
Output for 4.3.0 - 5.2.17
Notice: Array to string conversion in /in/oj6cC on line 5 Ar