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@ 2013-12-03T16:43:42Z

<?php
var_dump(preg_match('[0-9]{10,11}','6309387601'));

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

42.47 ms | 402 KiB | 5 Q