考虑到 Gmail (user.name+label@gmail.com),如何在 PHP 中检查重复的电子邮件地址
如何在 PHP 中检查重复的电子邮件地址,并考虑到 Gmail 的自动标记器和标点符号?
How can I check for duplicate email addresses in PHP, with the possibility of Gmail's automated labeler and punctuation in mind?
例如,我希望将这些地址检测为重复:
For example, I want these addressed to be detected as duplicates:
username@gmail.com
user.name@gmail.com
username+label@gmail.com
user.name+label@gmail.com
尽管 Daniel A. White 声称:在 Gmail 中,@"(和标签)之前随机位置的点可以随意放置.user.name@gmail.com 和 username@gmail.com 实际上是同一个用户.
Despite what Daniel A. White claims: In Gmail, dots at random places before the '@' (and label) can be placed as much as you like. user.name@gmail.com and username@gmail.com are in fact the same user.
推荐答案
$email_parts = explode('@', $email);
// check if there is a "+" and return the string before
$before_plus = strstr($email_parts[0], '+', TRUE);
$before_at = $before_plus ? $before_plus : $email_parts[0];
// remove "."
$before_at = str_replace('.', '', $before_at);
$email_clean = $before_at.'@'.$email_parts[1];
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