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@ 2014-09-11T08:42:38Z

<?php
var_dump(preg_match('/あ/u', "\xE38182", $matches));
var_dump(preg_match('//u', "\xF0A0808B", $matches));
var_dump(preg_match('//u', "𠀋", $matches));

var_dump("\xF0A0808B" == "𠀋");

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
preg_match: documentation ( source)

preferences:dark modelive preview

35.06 ms | 402 KiB | 5 Q