3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 'abcdef'; $x = substr($a, 0, strlen($a)-1);echo $x;echo "\n"; $y = substr($x, 0, strlen($x)-1);echo strlen('a');
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
abcde 1