3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $php_ver = phpversion(); $php_ver == "5.6.16" or exit(); ECHO "<h1>$php_ver</h1>";
based on 9WIQX
Output for 5.3.20 - 5.6.15, 5.6.17 - 7.2.0
Output for 5.6.16
<h1>5.6.16</h1>