PHP 爬取图片 保存本地

    public function getImage($url,$filename='')

    {

        if($url == ''){

            return false;

        }

        if($filename == ''){

            $ext = pathinfo($url);

            if($ext['extension'] != "jpg" && $ext['extension'] != "png"){

                return false;

            }

            $filename = time() .".". $ext['extension'];

        }

        //文件保存路径

        ob_start();

        readfile ($url);

        $img = ob_get_contents();

        ob_end_clean();

        $size = strlen($img);

        $fp2 = fopen($filename,"a");

        fwrite($fp2,$img);

        fclose($fp2);

        return $filename;

    }

 getImage("http://xxxxx.jpg");