WordPress at a glance
filter is not described

self_admin_url filter-hook . WP 4.9.0

Filters the admin URL for the current site or network depending on context.

Usage

add_filter( 'self_admin_url', 'filter_function_name_5214', 10, 3 );
function filter_function_name_5214( $url, $path, $scheme ){
	// filter...

	return $url;
}
$url(string)
The complete URL including scheme and path.
$path(string)
Path relative to the URL. Blank string if no path is specified.
$scheme(string)
The scheme to use.

Where the hook is called

self_admin_url()
wp-includes/link-template.php 3365
return apply_filters( 'self_admin_url', $url, $path, $scheme );

Where the hook is used (in WP core)

Does not used.