How do I get the root url of the site?

Question

Might be a trivial question, but I am looking for a way to say get the root of a site url, for example: http://localhost/some/folder/containing/something/here/or/there

Answer 1

This PHP function returns the real URL of a full path.

function pathUrl($dir = __DIR__){

    $root = "";
    $dir = str_replace('\\', '/', realpath($dir));

    //HTTPS or HTTP
    $root .= !empty($_SERVER['HTTPS']) ? 'https' : 'http';

    //HOST
    $root .= '://' . $_SERVER['HTTP_HOST'];

    //ALIAS
    if(!empty($_SERVER['CONTEXT_PREFIX'])) {
        $root .= $_SERVER['CONTEXT_PREFIX'];
        $root .= substr($dir, strlen($_SERVER[ 'CONTEXT_DOCUMENT_ROOT' ]));
    } else {
        $root .= substr($dir, strlen($_SERVER[ 'DOCUMENT_ROOT' ]));
    }

    $root .= '/';

    return $root;
}

Call of pathUrl in this file : http://example.com/shop/index.php

#index.php

echo pathUrl();
//http://example.com/shop/

Work with alias : http://example.com/alias-name/shop/index.php

#index.php

echo pathUrl();
//http://example.com/alias-name/shop/

For sub directory : http://example.com/alias-name/shop/inc/config.php

#config.php

echo pathUrl(__DIR__ . '/../');
//http://example.com/alias-name/shop/