WordPress at a glance
filter is not described

stylesheet_directory_uri filter-hook . WP 1.5.0

Filters the stylesheet directory URI.

Usage

add_filter( 'stylesheet_directory_uri', 'filter_function_name_2670', 10, 3 );
function filter_function_name_2670( $stylesheet_dir_uri, $stylesheet, $theme_root_uri ){
	// filter...

	return $stylesheet_dir_uri;
}
$stylesheet_dir_uri(string)
Stylesheet directory URI.
$stylesheet(string)
Name of the activated theme's directory.
$theme_root_uri(string)
Themes root URI.

Where the hook is called

get_stylesheet_directory_uri()
wp-includes/theme.php 208
return apply_filters( 'stylesheet_directory_uri', $stylesheet_dir_uri, $stylesheet, $theme_root_uri );

Where the hook is used (in WP core)

Does not used.