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@ 2012-11-15T18:53:40Z

<?php
var_dump(preg_match('/^10400\d{12}$/', '10400512673180001'));

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

62.47 ms | 402 KiB | 5 Q