How to get host name from URL using PHP

Extracting the host name from a URL in PHP is a common task in web development. The host name is the domain part of a URL, such as example.com in https://www.example.com/page. By using built-in PHP functions, you can easily obtain the host name from any given URL. This is useful for tasks like URL validation, parsing, and handling different domain-specific logic.

To extract the host name from a URL, you can use the parse_url() function. This function breaks down a URL into its components, including the scheme, host, path, and more. By accessing the host component, you can retrieve the domain name.

1. Use the parse_url() function to parse the URL.

   $url = "https://www.example.com/page";
   $parsedUrl = parse_url($url);

2. Access the host component from the result of parse_url().

   $hostName = $parsedUrl['host'];

3. Store the host name in a variable for further use.

   echo "Host name: " . $hostName;

4. Implement error handling to manage invalid URLs.

   if (isset($parsedUrl['host'])) {
       echo "Host name: " . $hostName;
   } else {
       echo "Invalid URL or host component not found.";
   }