php获取CSS文件中图片地址并下载到本地的方法

/**?
* 获取CSS中图片地址,并且保存到本地?
*/
class getInCssImage
{???
??????? /**?
???????? *? 图片保存下来
???????? * @param $cssUrl css的url地址
???????? * @param $dir 保存图片的目录
???????? * @return void
???????? */
??????? static public function saveImage($cssUrl,$dir)
??????? {???
??????????? $content = file_get_contents($cssUrl);??
??????????? $patterns = '/images(.*).(jpg|gif|png)/'; //正则根据不同地址需要变换
??????????? preg_match_all($patterns,$content,$matches);
??????????? $imagesUrls = $matches[0];
??????????? if (!is_dir($dir))
??????????????? mkdir(dirname(__FILE__). '/'. $dir,0777);
??????????? foreach($imagesUrls as $image)
??????????? {???
??????????????? ob_start();
??????????????? $imageUrl = "http://www.xxxx.com/".$image; //这个地址填入你想要抓取的地址
??????????????? readfile($imageUrl);
??????????????? $img? = ob_get_contents();
??????????????? ob_end_clean();
??????????????? $size = strlen($img);
??????????????? $localImage = $dir. strchr($image,'/'); //存到本地的图片地址
??????????????? $fp = fopen($localImage,'a');
??????????????? fwrite($fp,$img);
??????????????? fclose($fp);
??????????? }???
??????? }???
}
$content = getInCssImage::saveImage('/css/css.css','image');