WordPress at a glance
filter is not described

supercache_dir filter-hook . WPSCache 1.0

Usage

add_filter( 'supercache_dir', 'filter_function_name_286' );
function filter_function_name_286( $dir ){
	// filter...

	return $dir;
}
$dir
-

Where the hook is called

get_current_url_supercache_dir()
supercache_dir
wp-super-cache/wp-cache-phase2.php 668
$dir = apply_filters( 'supercache_dir', $dir );

Where in WP core the hook is used WP Super Cache

Usage not found.