/**  
* 獲取CSS中圖片地址,并且保存到本地  
*/ 
class getInCssImage 
{    
        /**  
         *  圖片保存下來 
         * @param $cssUrl css的url地址 
         * @param $dir 保存圖片的目錄 
         * @return void 
         */ 
        static public function saveImage($cssUrl, $dir) 
        {    
            $content = file_get_contents($cssUrl);   
            $patterns = '/images(.*).(jpg|gif|png)/'; //正則根據不同地址需要變換 
            preg_match_all($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; //這個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, '/'); //存到本地的圖片地址 
                $fp = fopen($localImage, 'a'); 
                fwrite($fp, $img); 
                fclose($fp); 
            }    
        }    
} 
$content = getInCssImage::saveImage('/css/css.css', 'image');