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run code in 200+ php & hhvm versions
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<?php echo htmlspecialchars('alert(\'aaa\')', ENT_QUOTES);
based on 91JKB
Output for 4.3.2 - 7.2.0
alert(&#039;aaa&#039;)
Output for 4.3.0 - 4.3.1

Process exited with code 139.