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run code in 150+ php & hhvm versions
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<?php $x = 1; while ($x < 10) { if ($x !== 5) { echo $x.'<br>'; $x++; } } ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1<br>2<br>3<br>4<br>
Process exited with code 137.