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run code in 200+ php & hhvm versions
Bugs & Features
<?php echo htmlspecialchars(strip_tags('|< script>alert(\'xss\');</script>|'), ENT_QUOTES, 'UTF-8');
Output for 4.3.2 - 7.2.0
|&lt; script&gt;alert(&#039;xss&#039;);|
Output for 4.3.0 - 4.3.1

Process exited with code 139.