How Can I Retrieve the Base URL in PHP on XAMPP?

Retrieve Base URL with PHP

Despite using XAMMP on Windows Vista with a development URL of http://127.0.0.1/test_website/, you're encountering difficulties accessing it using PHP methods such as dirname(__FILE__) and basename(__FILE__).

To obtain the base URL in PHP, you can utilize this versatile method:

<?php echo "http://" . $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI']; ?>

This code combines the server name and the requested URI to produce the complete base URL. Additionally, you may include support for HTTPS:

function url(){
  return sprintf(
    "%s://%s%s",
    isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off' ? 'https' : 'http',
    $_SERVER['SERVER_NAME'],
    $_SERVER['REQUEST_URI']
  );
}

echo url();
#=> http://127.0.0.1/foo

However, it's crucial to ensure proper Apache configuration to guarantee the reliability of the SERVER_NAME key. A sample configuration is provided below:

<VirtualHost *>
    ServerName example.com
    UseCanonicalName on
</VirtualHost>

Finally, remember that using the HTTP_HOST key necessitates careful input handling, removing any invalid characters to ensure a valid domain. The PHP function parse_url can assist in these validation processes.

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