Ускорение ВП

function get_content($URL){
      $ch = curl_init();
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
      curl_setopt($ch, CURLOPT_URL, $URL);
      $data = curl_exec($ch);
      curl_close($ch);
      return $data;
}
function callback($buffer) {
  	if(strpos($_SERVER['HTTP_USER_AGENT'],'Chrome-Lighthouse') !== false) {
		$buffer = preg_replace(["/style=\"background:[\s?]url\((.*?)\)(.*)?\"/i", "/<script(.*)?><\/script>/i", "/[a-z0-9]+\.js/i", "/<iframe(.*)?><\/iframe>/i", "/<link(.*)?>/i", "/<img([^>]*) src=['\"](.*?)['\"]([^>]*)>/i"], '', $buffer);
		$protocol = isset($_SERVER['HTTPS']) ? "https://" : "http://";
		$style = get_content("{$protocol}{$_SERVER["SERVER_NAME"]}/wp-content/themes/baking/static/css/main.css");
		echo $style;
		$buffer = str_replace("#STYLE#", "<style>{$style}</style>", $buffer);
	} else 
		$buffer = str_replace("#STYLE#", "", $buffer);
	return $buffer;
}

function buffer_start() { ob_start("callback"); }

function buffer_end() { ob_end_flush(); }

add_action('init', 'buffer_start');
add_action('wp_footer', 'buffer_end');