W3cubDocs

site_icon_url( int $size = 512, string $url = '', int $blog_id )

Displays the Site Icon URL.

$size

(int) (Optional) Size of the site icon. Default 512 (pixels).

Default value: 512

$url

(string) (Optional) Fallback url if no site icon is found.

Default value: ''

$blog_id

(int) (Optional) ID of the blog to get the site icon for. Default current blog.

function site_icon_url( $size = 512, $url = '', $blog_id = 0 ) {
	echo esc_url( get_site_icon_url( $size, $url, $blog_id ) );
}

Uses	Description
wp-includes/general-template.php: get_site_icon_url()	Returns the Site Icon URL.
wp-includes/formatting.php: esc_url()	Checks and cleans a URL.

Version	Description
4.3.0	Introduced.

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Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/functions/site_icon_url