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@ 2014-02-26T20:39:19Z

<?php
$arr = array(
'0',
'00',
'000',
'0000',
'00000',
'000000',
'0000000',
'00000000');
$id_pattern = "/^\d{7}$/";
foreach($arr as $id){
   if(preg_match($id_pattern, $id, $regs)) var_dump($regs);
}

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

40.33 ms | 402 KiB | 5 Q