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@ 2014-09-08T09:39:35Z

<?php
$valueString = 'test.-';
 $pattern = '/[a-z0-9]{1,7}/i';
var_dump(@preg_match($pattern, $valueString));

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

34.07 ms | 402 KiB | 5 Q