get_site_url() │ WP 3.0.0

Retrieves the URL for a given site where WordPress application files (e.g. wp-blog-header.php or the wp-admin/ folder) are accessible.

Returns the site_url with the appropriate protocol, 'https' if is_ssl() and 'http' otherwise. If $scheme is 'http' or 'https', is_ssl() overridden.

Used By: site_url(), get_admin_url()

1 time — 0.000067 sec (very fast) | 50000 times — 2.20 sec (fast)

Hooks from the function

site_url

Return

String. Site URL link with optional path appended.

Usage

get_site_url( $blog_id, $path, $scheme );

$blog_id(int|null): Site ID.
Default: null (current site)
$path(string): Path relative to the site URL.
Default: ''
$scheme(string|null): Scheme to give the site URL context. Accepts 'http', 'https', 'login', 'login_post', 'admin', or 'relative'.
Default: null

Examples

#1 Demo

echo get_site_url();

// Displays: http://www.example.com

If WP installed into subfolder, returns:

https://www.example.com/sub/folder

#2 Let's specify the protocol forcibly

echo get_site_url( null, '/wp-content/themes/', 'https' );

// Displays: https://example.com/wp-content/themes/

#3 Get just the hostname

To get just the hostname/domain component of the Site URL (without paths, schema, etc.) you could use the following:

echo parse_url( get_site_url(), PHP_URL_HOST ); // wp-kama.com

Changelog

Since 3.0.0

Introduced.

Code of `get_site_url() get site url` ^{WP 6.0.1}

wp-includes/link-template.php

function get_site_url( $blog_id = null, $path = '', $scheme = null ) {
	if ( empty( $blog_id ) || ! is_multisite() ) {
		$url = get_option( 'siteurl' );
	} else {
		switch_to_blog( $blog_id );
		$url = get_option( 'siteurl' );
		restore_current_blog();
	}

	$url = set_url_scheme( $url, $scheme );

	if ( $path && is_string( $path ) ) {
		$url .= '/' . ltrim( $path, '/' );
	}

	/**
	 * Filters the site URL.
	 *
	 * @since 2.7.0
	 *
	 * @param string      $url     The complete site URL including scheme and path.
	 * @param string      $path    Path relative to the site URL. Blank string if no path is specified.
	 * @param string|null $scheme  Scheme to give the site URL context. Accepts 'http', 'https', 'login',
	 *                             'login_post', 'admin', 'relative' or null.
	 * @param int|null    $blog_id Site ID, or null for the current site.
	 */
	return apply_filters( 'site_url', $url, $path, $scheme, $blog_id );
}