是否可以通过PHP以编程方式从电子邮件地址中查找邮件子域或URL？

Question

After a user create account, I plan on displaying a link to lead user to the mail server of his email. For example : if user1 has [e-mail], the link would point towards gmail.com or mail.google.com. if user2 has [e-mail] the link would point towards mail.yahoo.com.

In PHP I can do

$domain = explode("@", '[e-mail]')[1];
$domain2 = explode("@", '[e-mail]')[1];
$mailUrl = $domain; //will work
$mailUrl2 = $domain; //will not work
$mailUrl = 'mail.'.$domain; //will not work
$mailUrl2 = 'mail.'.$domain; // will work

So I cannot predict manually the submain structure. I was wondering if there is a PHP function or Laravel 4 package that returns me the proper subdomain for the email address like gmail.com, mail.google.com, mail.yahoo.com, hotmail.com, etc.

Answer 1

You can easily achieve this using the PHP function getmxrr.

Here's a snippet:

<?php
    // Where the mx records will be added 
    $records = [];

    // Calling, change gmail.com to whatever you need
    getmxrr('gmail.com', $records);

    // dump the array's contents
    var_dump($records);
?>