正在注册的电子邮件的 PHP 检查域是“school.edu"地址 [英] PHP Check domain of email being registered is a 'school.edu' address

问题描述

我需要为一个我正在从事的项目编写一个函数，目的是为了好玩，我们正在制作一个网站，仅供学校的学生、教职员工和校友访问.

I need to write a function for a project i'm working on for fun, where we're making a site only accessible to students, staff, and alumni at an institution.

假设学校网站是:school.edu.

Let's say the schools website is: school.edu.

我在编写用于检查提交的电子邮件地址是否具有school.edu"域的 php 过滤器时遇到问题

I'm having trouble writing a php filter that checks that the submitted email address has the domain of "school.edu"

我会举一个例子.Dude #1 的电子邮件是 [e-mail]，Dude #2 的电子邮件是 [e-mail].我想确保 Dude 1 收到错误消息，并且 Dude #2 已成功注册.

I'll use an example. Dude #1 has an email of [e-mail] and Dude #2 has an email at [e-mail]. I want to make sure that Dude 1 gets an error message, and Dude #2 has a successful registration.

这就是我想要做的事情的要点.在不久的将来，该网站将允许另外两个地区学校注册:school2.edu 和 school3.edu.然后，我需要检查器根据域的小列表(可能是数组?)来检查电子邮件，以验证电子邮件是否属于列表中的域名.

That's the gist of what I'm trying to do. In the near future the site will allow registration by another two locale schools: school2.edu and school3.edu. I will then need the checker to check the email against a small list (maybe an array?) of domains to verify that the email is of a domain name on the list.

推荐答案

有几种方法可以实现这一点，这里是一种:

There's a few ways to accomplish this, here's one:

// Make sure we have input
// Remove extra white space if we do
$email = isset($_POST['email']) ? trim($_POST['email']) : null;

// List of allowed domains
$allowed = [
    'school.edu',
    'school2.edu',
    'school3.edu'
];

// Make sure the address is valid
if (filter_var($email, FILTER_VALIDATE_EMAIL))
{
    // Separate string by @ characters (there should be only one)
    $parts = explode('@', $email);

    // Remove and return the last part, which should be the domain
    $domain = array_pop($parts);

    // Check if the domain is in our list
    if ( ! in_array($domain, $allowed))
    {
        // Not allowed
    }
}

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