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run code in 200+ php & hhvm versions
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<?php echo htmlentities('äöüß');
based on 5mbUa
Output for 5.4.0 - 7.2.0
&auml;&ouml;&uuml;&szlig;
Output for 4.3.0 - 5.3.29
&Atilde;&curren;&Atilde;&para;&Atilde;&frac14;&Atilde;�