3v4l.org

run code in 150+ php & hhvm versions
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<?php global $i; $x=$y=''; set_error_handler(function() { echo 'Depth:' . $i . PHP_EOL; }); for($i=0;true;++$i) { $x .= '['; $y .= ']'; eval('$a = ' . $x . $y . ';'); }
based on B3jQL

Abusive script

This script was stopped while abusing our resources

Output for 5.4.0 - 5.4.34

Process exited with code 137.