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@ 2013-05-14T22:30:02Z

<?php

var_dump( preg_replace( '//u', '', "\xf4\x8f\xbf\xbf" ) );

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
preg_replace: documentation ( source)

preferences:dark modelive preview

49.03 ms | 402 KiB | 5 Q