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run code in 150+ php & hhvm versions
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<?php echo htmlentities("abe æøå aalkn");
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
abe &aelig;&oslash;&aring; aalkn
Output for 4.3.0 - 5.3.29
abe &Atilde;&brvbar;&Atilde;&cedil;&Atilde;&yen; aalkn