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run code in 200+ php & hhvm versions
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<?php echo htmlspecialchars('"><script src="//evil.com/hack.js"></script><br class="a', ENT_QUOTES, 'utf-8');
Output for 4.3.2 - 7.1.10
&quot;&gt;&lt;script src=&quot;//evil.com/hack.js&quot;&gt;&lt;/script&gt;&lt;br class=&quot;a
Output for 4.3.0 - 4.3.1

Process exited with code 139.