Online PHP editor | refs for jR7q4

<?php echo "start",PHP_EOL; $i=0; $b=1; $z=2; echo "before loop",PHP_EOL; while (true) { $i++; $b*=2; $z**=$z; echo "inside loop",PHP_EOL; if ($z>1e300) goto w0; } echo "after loop, something went wrong... debugging :)",PHP_EOL; var_dump($i, $b, $z); w0: echo "after loop",PHP_EOL; echo "after default",PHP_EOL;