3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $str = '回';echo pack('a3',$str); echo $bin = pack("C3", ord($str{0}), ord($str{1}), ord($str{2}));//回 $hex = strtoupper(bin2hex($bin)); echo "UTF-8编码: " . $hex . "\n";
Output for 4.3.0 - 7.1.0
回回UTF-8编码: E59B9E