Emai regular, how to solve

Source: Internet
Author: User
Emai Regular
How does this write the message?
function Check ($STR) {
$re = '/([a-z0-9_-]+) @\1 (\.[ a-z0-9_-]) +/i ';
Preg_match ($re, $str, $result);
return $result;
}
Var_dump (check (' 123456@qq.com '));
?>
------Optimal Solution--------------------
According to your regular way, the mailbox changed to 123456@123456.com can be matched to.
------Other Solutions--------------------
The \1 behind your @ is a back reference ah, of course it's going to go wrong.

$re = '/([a-z0-9_-]+) @ ([a-z0-9_-]+) (\. ( [a-z0-9_-]) +) +/i ';


------Other Solutions--------------------
Reference:
According to your regular way, the mailbox changed to 123456@123456.com can match to.
look at the back of the really can't be sure to match! If you know which mailbox suffixes you're primarily matching, it's okay.
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