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run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(html_entity_decode('&#xd800;'));
based on r7Ypv
Output for 4.3.0 - 5.6.21, 7.0.0 - 7.1.0
string(8) "&#xd800;"
Output for hhvm-3.10.0 - 3.12.0
string(3) "�"