3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump( htmlspecialchars( "\xef\xbf\xbf", ENT_COMPAT, 'UTF-8' ) );
Output for 4.3.2 - 7.1.0
string(3) "￿"
Output for 4.3.0 - 4.3.1

Process exited with code 139.