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@ 2017-07-07T01:12:15Z

<?php
$email = '158412154@qq.com';
$aa = preg_match("/[_a-zA-Z\d\-\.]+@[_a-zA-Z\d\-]+(\.[_a-zA-Z\d\-]+)+$/i", $email);
var_dump($aa);

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

45.81 ms | 402 KiB | 5 Q