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@ 2013-08-01T07:06:18Z

<?php
var_dump(mb_check_encoding( "\xf4\x90\x80\x80", 'UTF-8' ));

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
mb_check_encoding: documentation ( source)

preferences:dark modelive preview

46.73 ms | 402 KiB | 5 Q