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run code in 150+ php & hhvm versions
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<?php //echo htmlspecialchars(strip_tags('|< script>alert(\'xss\');</script>|'), ENT_QUOTES, 'UTF-8'); echo strip_tags('|< script>alert(\'xss\');</script>|');
Output for 4.3.2 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
|< script>alert('xss');|
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.0 - 4.3.1
|alert('xss');|