Kirki_Fonts_Google::create_link PHP Method

        private function create_link()
        {
            // If we don't have any fonts then we can exit.
            if (empty($this->fonts)) {
                return;
            }
            // Get font-family + subsets.
            $link_fonts = array();
            foreach ($this->fonts as $font => $variants) {
                // Are we force-loading all variants?
                if (true === self::$force_load_all_variants) {
                    if (isset($this->google_fonts[$font]['variants'])) {
                        $variants = $this->google_fonts[$font]['variants'];
                    }
                }
                $variants = implode(',', $variants);
                $link_font = str_replace(' ', '+', $font);
                if (!empty($variants)) {
                    $link_font .= ':' . $variants;
                }
                $link_fonts[] = $link_font;
            }
            // Are we force-loading all subsets?
            if (true === self::$force_load_all_subsets) {
                if (isset($this->google_fonts[$font]['subsets'])) {
                    foreach ($this->google_fonts[$font]['subsets'] as $subset) {
                        $this->subsets[] = $subset;
                    }
                }
            }
            if (!empty($this->subsets)) {
                $this->subsets = array_unique($this->subsets);
            }
            $this->link = add_query_arg(array('family' => str_replace('%2B', '+', urlencode(implode('|', $link_fonts))), 'subset' => urlencode(implode(',', $this->subsets))), 'https://fonts.googleapis.com/css');
        }