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function is not described

get_current_url_supercache_dir() WPSCache 1.0

Hooks from the function
Return

Null. Nothing.

Usage

get_current_url_supercache_dir( $post_id );

Code of get_current_url_supercache_dir() WPSCache 1.7.1

wp-super-cache/wp-cache-phase2.php 
<?php
function get_current_url_supercache_dir( $post_id = 0 ) {
	global $cached_direct_pages, $cache_path, $wp_cache_request_uri, $WPSC_HTTP_HOST, $wp_cache_home_path;
	static $saved_supercache_dir = array();

	if ( isset( $saved_supercache_dir[ $post_id ] ) ) {
		return $saved_supercache_dir[ $post_id ];
	}

	$DONOTREMEMBER = 0;
	if ( $post_id != 0 ) {
		$site_url = site_url();
		$permalink = get_permalink( $post_id );
		if ( false === strpos( $permalink, $site_url ) ) {
			/*
			 * Sometimes site_url doesn't return the siteurl. See https://wordpress.org/support/topic/wp-super-cache-not-refreshing-post-after-comments-made
			 */
			$DONOTREMEMBER = 1;
			wp_cache_debug( "get_current_url_supercache_dir: WARNING! site_url ($site_url) not found in permalink ($permalink).", 1 );
			if ( preg_match( '`^(https?:)?//([^/]+)(/.*)?$`i', $permalink, $matches ) ) {
				if ( $WPSC_HTTP_HOST != $matches[2] ) {
					wp_cache_debug( "get_current_url_supercache_dir: WARNING! SERVER_NAME ({$WPSC_HTTP_HOST}) not found in permalink ($permalink).", 1 );
				}
				wp_cache_debug( "get_current_url_supercache_dir: Removing SERVER_NAME ({$matches[2]}) from permalink ($permalink). Is the url right?", 1 );
				$uri = isset( $matches[3] ) ? $matches[3] : '';
			} elseif ( preg_match( '`^/([^/]+)(/.*)?$`i', $permalink, $matches ) ) {
				wp_cache_debug( "get_current_url_supercache_dir: WARNING! Permalink ($permalink) looks as absolute path. Is the url right?", 1 );
				$uri = $permalink;
			} else {
				wp_cache_debug( "get_current_url_supercache_dir: WARNING! Permalink ($permalink) could not be understood by parsing url. Using front page.", 1 );
				$uri = '';
			}
		} else {
			$uri = str_replace( $site_url, '', $permalink );
			if ( strpos( $uri, $wp_cache_home_path ) !== 0 )
				$uri = rtrim( $wp_cache_home_path, '/' ) . $uri;
		}
	} else {
		$uri = strtolower( $wp_cache_request_uri );
	}
	$uri = wpsc_deep_replace( array( '..', '\\', 'index.php', ), preg_replace( '/[ <>\'\"\r\n\t\(\)]/', '', preg_replace( "/(\?.*)?(#.*)?$/", '', $uri ) ) );
	$hostname = $WPSC_HTTP_HOST;
	// Get hostname from wp options for wp-cron, wp-cli and similar requests.
	if ( empty( $hostname ) && function_exists( 'get_option' ) ) {
		$hostname = (string) parse_url( get_option( 'home' ), PHP_URL_HOST );
	}
	$dir = preg_replace( '/:.*$/', '', $hostname ) . $uri; // To avoid XSS attacks
	if ( function_exists( "apply_filters" ) ) {
		$dir = apply_filters( 'supercache_dir', $dir );
	} else {
		$dir = do_cacheaction( 'supercache_dir', $dir );
	}
	$dir = $cache_path . 'supercache/' . $dir . '/';
	if( is_array( $cached_direct_pages ) && in_array( $_SERVER[ 'REQUEST_URI' ], $cached_direct_pages ) ) {
		$dir = ABSPATH . $uri . '/';
	}
	$dir = str_replace( '..', '', str_replace( '//', '/', $dir ) );
	wp_cache_debug( "supercache dir: $dir", 5 );
	if ( $DONOTREMEMBER == 0 )
		$saved_supercache_dir[ $post_id ] = $dir;
	return $dir;
}