_wp_upload_dir example

function wp_upload_dir( $time = null, $create_dir = true, $refresh_cache = false ) {
    static $cache = array(), $tested_paths = array();

    $key = sprintf( '%d-%s', get_current_blog_id(), (string) $time );

    if ( $refresh_cache || empty( $cache[ $key ] ) ) {
        $cache[ $key ] = _wp_upload_dir( $time );
    }

    /** * Filters the uploads directory data. * * @since 2.0.0 * * @param array $uploads { * Array of information about the upload directory. * * @type string $path Base directory and subdirectory or full path to upload directory. * @type string $url Base URL and subdirectory or absolute URL to upload directory. * @type string $subdir Subdirectory if uploads use year/month folders option is on. * @type string $basedir Path without subdir. * @type string $baseurl URL path without subdir. * @type string|false $error False or error message. * } */