3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1,2,3); $string = current($a); $i = 0; while($b = next($a) && strlen($string.$b) < 2){ $string .= $b; } echo $string;
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $b in /in/vZZcL on line 5 11

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