PHP get domain name

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    2024-01-11T18:05:21+00:00

    It's a question about how to retrieve the domain name in a PHP script.

    To get the domain name in PHP, you can use the $_SERVER superglobal array. This array contains information about headers, paths, and script locations. The $_SERVER['HTTP_HOST'] or $_SERVER['SERVER_NAME'] elements are commonly used to get the domain name. Here are the methods:

    1. Using $_SERVER['HTTP_HOST']: This will return the contents of the Host: header from the current request, if there is one.

      $domainName = $_SERVER['HTTP_HOST'];
      echo $domainName;
      
    2. Using $_SERVER['SERVER_NAME']: This returns the server name as defined in the server configuration. If you're running virtual hosting, it will return the value defined for that virtual host.

      $domainName = $_SERVER['SERVER_NAME'];
      echo $domainName;
      

    Remember, the output of these variables might differ based on your server configuration and whether you're running your script in a virtual host environment. Also, HTTP_HOST is a user-defined value and can be manipulated, so for more secure applications, prefer using SERVER_NAME which is defined in the server configuration.

    Additionally, if you need to get the full URL, you can concatenate the protocol, domain name, and the request URI like this:

    $fullUrl = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
    echo $fullUrl;
    

    Here, $_SERVER['REQUEST_URI'] will return the URI which was given in order to access the page; for instance, '/index.html'.

    These are the basic and most common methods to retrieve the domain name in PHP. Depending on your specific needs or server setup, there might be other variations or considerations.

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