3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array(1,1,2,2,3,3,4,4,5,5,6,6,7,7,8); for ($c = count($arr), $i = 1; $i < $c; $i++) $arr[0] ^= $arr[i]; echo $arr[0];
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Undefined constant "i" in /in/mVEi3:3 Stack trace: #0 {main} thrown in /in/mVEi3 on line 3
Process exited with code 255.

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