3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = array(1,2,3); $string = current($a); $i = 0; while($b = next($a) && strlen($string.$b) < 2){ $string .= $b; } echo $string;
based on mJlsG
Output for 5.0.4 - 7.1.0
Notice: Undefined variable: b in /in/vZZcL on line 5 11
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: b in /in/vZZcL on line 5 11