以下是验证电子邮件的正则表达式 - \S+@\S+\.\S+
,我没有写这个正则表达式。作为一个新手,我对正则表达式不是很熟悉,以下是我的几个问题:
- 上面的正则表达式有什么错误?
- 什么是一个好的验证电子邮件的正则表达式?
以下是验证电子邮件的正则表达式 - \S+@\S+\.\S+
,我没有写这个正则表达式。作为一个新手,我对正则表达式不是很熟悉,以下是我的几个问题:
Mail :: RFC822 :: Address:基于正则表达式的地址验证
Mail :: RFC822 :: Address是一个Perl模块,用于根据RFC 822语法验证电子邮件地址。它提供与RFC :: RFC822 :: Address相同的功能,但使用Perl正则表达式而不是Parse :: RecDescent解析器。这意味着该模块加载速度更快,因为它不需要在启动时编译语法。
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if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
// invalid email address
}
if(isEmialExist("EMAIL_ADDRESS_THAT"))
{
echo "email exists, real email";
}
else
{
echo "email doesn't exist";
}
function isEmialExist($emailAddress)
{
if (!filter_var($emailAddress, FILTER_VALIDATE_EMAIL)) {
return false; //invalid format
}
//now check if email really exist
$postdata = http_build_query(array('api_key' => 'YOUR_API_KEY', 'email' => $emailAddress ));
$url = "https://email-validator.com/api/v1.0/json";
$opts = array('http' => array( 'method' => 'POST', 'header' => 'Content-Type: application/x-www-form-urlencoded', 'content' => $postdata ));
$context = stream_context_create($opts);
$result = file_get_contents($url, false, $context);
$data = json_decode($result, false);
return $data->is_exists;
}
上述正则表达式有什么问题?
RFC822电子邮件地址标准非常宽松,因此很难找到一个简洁的正则表达式来捕获所有可能的有效电子邮件。事情变得复杂的原因是并不是每个邮件服务器/客户端都强制执行此标准,因此实际数据可能会出现问题。
虽然您可以猜测或强制执行特定格式,但编写临时表达式几乎可以保证您将拥有大量垃圾邮件地址或拒绝有效地址。
验证电子邮件的好的正则表达式是什么?
这是针对RFC进行验证的参考正则表达式,它在这里作为Perl模块实现,但也是O'Reilly的“Mastering Regular Expressions”的最终清单。
mipadi
和mmyers
,你们两个都错了:\S
匹配.
(点)和+
。 - Bart Kiers