How Can I Get My Website's Base URL Using PHP?

Acquire the Base URL with PHP

Navigating your website's URL structure is a critical aspect of PHP development. One common requirement is obtaining the base URL, which identifies the root directory of your website.

Solution:

To retrieve the base URL in PHP, utilize the following code:

echo "http://" . $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI'];

This approach amalgamates the current domain name ($_SERVER['SERVER_NAME']) with the requested path ($_SERVER['REQUEST_URI']) to provide the full base URL.

HTTPS Compatibility:

If your website utilizes HTTPS, employ the following function:

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

Apache Configuration:

To ensure accurate results, verify that your Apache server is configured appropriately:

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

Considerations:

When relying on the HTTP_HOST key, which contains user input, be vigilant about sanitizing and removing any invalid characters that could compromise the URL's integrity. Utilize the parse_url function for guidance.

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