WordPress at a glance
filter is not described

stylesheet_directory filter-hook . WP 1.5.0

Filters the stylesheet directory path for current theme.

Usage

add_filter( 'stylesheet_directory', 'filter_function_name_5232', 10, 3 );
function filter_function_name_5232( $stylesheet_dir, $stylesheet, $theme_root ){
	// filter...

	return $stylesheet_dir;
}
$stylesheet_dir(string)
Absolute path to the current theme.
$stylesheet(string)
Directory name of the current theme.
$theme_root(string)
Absolute path to themes directory.

Where the hook is called

get_stylesheet_directory()
stylesheet_directory
wp-includes/theme.php 184
return apply_filters( 'stylesheet_directory', $stylesheet_dir, $stylesheet, $theme_root );

Where the hook is used (in WP core)

Does not used.