February 12, 2011 
Definition:
function site_url( $path = '', $scheme = null ) {}
Retrieve the site url for the current site.
Returns the ‘site_url’ option with the appropriate protocol, ‘https’ if is_ssl() and ‘http’ otherwise. If $scheme is ‘http’ or ‘https’, is_ssl() is overridden.
Parameters
- string $path: Optional. Path relative to the site url.
- string $scheme: Optional. Scheme to give the site url context. Currently ‘http’, ‘https’, ‘login’, ‘login_post’, or ‘admin’.
Return values
returns:Site url link with optional path appended.
Source code
function site_url( $path = '', $scheme = null ) {
return get_site_url(null, $path, $scheme);
}
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