supercache_filename_str filter-hookWPSCache 1.0

Usage

add_filter( 'supercache_filename_str', 'wp_kama_supercache_filename_str_filter' );

/**
 * Function for `supercache_filename_str` filter-hook.
 * 
 * @param  $extra_str 
 *
 * @return 
 */
function wp_kama_supercache_filename_str_filter( $extra_str ){

	// filter...
	return $extra_str;
}
$extra_str
-

Where the hook is called

supercache_filename()
supercache_filename_str
wp-super-cache/wp-cache-phase2.php 951
$extra_str = apply_filters( 'supercache_filename_str', $extra_str );

Where the hook is used in WP Super Cache

wp-super-cache/wp-cache-phase1.php 144
add_filter( 'supercache_filename_str', 'wp_cache_check_mobile' );
wp-super-cache/wp-cache-phase2.php 1439
add_filter( 'supercache_filename_str', 'wp_cache_check_mobile' );