3v4l.org

run code in 200+ php & hhvm versions
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<?php echo htmlentities('ó', ENT_COMPAT, 'UTF-8'), htmlentities('ó', ENT_COMPAT, 'ISO-8859-1'), htmlentities('ó');
Output for 5.4.0 - 7.2.0
&oacute;&Atilde;&sup3;&oacute;
Output for 4.3.2 - 5.3.29
&oacute;&Atilde;&sup3;&Atilde;&sup3;
Output for 4.3.0 - 4.3.1

Process exited with code 139.