PHP getmxrr() Function: Everything You Need to Know

As a PHP developer, you may need to obtain the mail exchange (MX) records for a given domain name. In such scenarios, the PHP getmxrr() function comes in handy. It is a built-in function in PHP that allows you to retrieve the MX records for a given domain name. In this article, we will take an in-depth look at the getmxrr() function and its usage.

What is the getmxrr() Function?

The getmxrr() function is a PHP built-in function that allows you to retrieve the MX records for a given domain name. It performs a DNS lookup on the domain name and returns an array of all MX records associated with the domain name.

How to Use the getmxrr() Function

Using the getmxrr() function is straightforward. Here is the syntax of the function:

getmxrr($hostname, &$mxhosts, &$weight);

The function takes three parameters:

• $hostname: The domain name for which you want to retrieve the MX records.
• &$mxhosts: A reference to an array that will store the MX hosts for the domain name.
• &$weight: A reference to an array that will store the MX hosts' weights for the domain name.

Here is an example of how to use the getmxrr() function to retrieve the MX records for a domain name:

<?php

$hostname = "example.com";
$mxhosts = [];
$weight = [];
if (getmxrr($hostname, $mxhosts, $weight)) {
  for ($i = 0; $i < count($mxhosts); $i++) {
    echo "MX record for $hostname: " . $mxhosts[$i] . ", Weight: " . $weight[$i] ;
  }
} else {
  echo "No MX record found for $hostname";
}

In this example, we retrieve the MX records for the domain name "example.com". The function performs a DNS lookup on the domain name and returns an array of all MX records associated with the domain name. We then loop through the array and display the MX hosts and their weights on the screen.

Conclusion

The getmxrr() function is a useful tool for retrieving the MX records for a given domain name. By understanding the syntax and usage of the function, you can easily obtain the MX records that you need for your PHP application. We hope this article has been informative and useful in understanding the getmxrr() function in PHP.