3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $string = ""; if (is_string($string) && isset($string[0])) { echo "y"; } else { echo "n"; }
Output for 4.3.3 - 4.4.9, 5.0.2 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
n
Output for 5.0.0 - 5.0.1
y
Output for 4.3.0 - 4.3.2
Notice: Uninitialized string offset: 0 in /in/2GL8F on line 5 n