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@ 2014-09-08T09:42:50Z

<?php
$valueString = '90898';
 $pattern = '/^[a-z0-9]{2,7}$/i';
var_dump(@preg_match($pattern, $valueString));

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

42.2 ms | 402 KiB | 5 Q