Astra_Minify::get_css_url()

		public static function get_css_url() {

			if ( defined( 'ASTRA_THEME_HTTP2' ) && ASTRA_THEME_HTTP2 ) {

				self::enqueue_http2_css();
				return false;
			} elseif ( ! get_option( 'ast-theme-css-status' ) ) {

				// Get the cache dir and css key.
				$cache_dir = self::get_cache_dir();
				$css_slug  = self::_asset_slug();
				$css_key   = get_option( self::$_css_key . '-' . $css_slug );
				$css_path  = $cache_dir['path'] . $css_slug . '-' . $css_key . '.css';
				$css_url   = $cache_dir['url'] . $css_slug . '-' . $css_key . '.css';

				if ( ! $css_key ) {
					self::render_css();
					return self::get_css_url();
				}

				// Check to see if the file exists.
				if ( ! file_exists( $css_path ) ) {
					self::render_fallback_css();
					return false;
				}

				// Return the url.
				return $css_url;
			} else {

				self::render_fallback_css();
				return false;
			}
		}