- mb_convert_encoding: documentation ( source)
- var_dump: documentation ( source)
- preg_match: documentation ( source)
<?php
var_dump(preg_match('//u', "\xE4B880"));
var_dump(preg_match('//u', "\xF0A0808B"));
var_dump(mb_convert_encoding('𠀋 ', 'UTF-8', 'UTF-8'));