PHP multiple domain names jump randomly

When making a website, sometimes multiple domain names need to be bound to the same website to increase the website's usability and traffic. In this case, users need to be randomly redirected to different domain names to achieve load balancing and distributed access. This article introduces how to use PHP to implement the random jump function of multiple domain names.

1. Obtain the domain name list

First you need to obtain the list of all domain names bound to the website. It can be obtained through the following code:

$domains = array("www.example.com", "www.example.net", "www.example.org");

Store all domain names in an array to facilitate subsequent operations.

2. Randomly select a domain name

Next, you need to implement a function that can randomly select a domain name from the domain name list and return the domain name. This can be achieved using PHP's rand function:

function random_domain($domains) {
  $index = rand(0, count($domains) - 1);
  return $domains[$index];
}

In the above code, the rand function is used to generate a random number and use the random number as an array index to obtain a random domain name.

3. Jump to a random domain name

After obtaining the random domain name, the user needs to be redirected to the domain name. It can be implemented using PHP's header function:

header("Location: " . random_domain($domains), true, 301);
exit();

Using the header function, you can send HTTP header information and redirect the user to a random domain name by setting the Location parameter. It is important to add a 301 status code to indicate that the jump is permanent so that search engines can handle the jump correctly.

The complete code is as follows:

$domains = array("www.example.com", "www.example.net", "www.example.org");

function random_domain($domains) {
  $index = rand(0, count($domains) - 1);
  return $domains[$index];
}

header("Location: " . random_domain($domains), true, 301);
exit();

Store the above code as a PHP file, and set up a .htaccess file in the root directory of the website to forward all requests to the PHP file :

RewriteEngine On
RewriteBase /
RewriteRule ^(.*)$ /redirect.php [L]

The above code indicates that all requests will be redirected to the redirect.php file. Be careful to replace redirect.php with the name of the PHP file where the code is actually stored.

Summary

Using PHP to implement the random jump function of multiple domain names can achieve load balancing and distributed access effects, and improve the availability and traffic of the website. The above code is simple and easy to understand and can quickly implement this function.

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