用thinkphp写的一个例子：抓取网站的内容并且保存到本地

    public function download() {
        $http = new \Org\Net\Http();
        $url_pref = "http://www.dzkbw.com/books/rjb/dili/xc7s/";
        $localUrl = "Public/bookcover/";
        $reg="|showImg\(‘(.+)‘\);|";
        $i=1;
        
        do {
            $filename = substr("000".$i,-3).".htm";
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $url_pref.$filename);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
            $html = curl_exec($ch);
            curl_close($ch);
            
            $result = preg_match_all($reg,$html,$out, PREG_PATTERN_ORDER);
            if($result==1) {
                $picUrl = $out[1][0];
                $picFilename = substr("000".$i,-3).".jpg";
                $http->curlDownload($picUrl, $localUrl.$picFilename);
            }
            $i = $i+1;
        } while ($result==1);

        echo "下载完成";
    }