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<?php function significant_number($string){ $offset=9; $string=substr($string, $offset); $count=strlen($string); $i=0; while($i < $count){ if(ctype_digit($string[$i])) { break; } $i++; } return $string[$i]; } $udid="086786dc4ae78dbf6a6a9b621b5ae4"; $md5udid=md5($udid); $sigNo=significant_number($udid); $testudid=substr($md5udid, 4, sigNo).substr($udid, sigNo, 6); echo $testudid; ?>

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37.65 ms | 402 KiB | 5 Q