blog->settings->system->theme != 'default') { return; } require dirname(__FILE__) . '/lib/class.blowup.config.php'; $core->addBehavior('publicHeadContent', ['tplBlowupTheme', 'publicHeadContent']); class tplBlowUpTheme { public static function publicHeadContent($core) { $url = blowupConfig::publicCssUrlHelper(); if ($url) { echo ''; } } }