php-curl采集百度搜索结果没有图片

phpcurl

<code><?php $url = "http://www.baidu.com/s?wd=csdn";// 构造包头，模拟浏览器请求$header = array (        "Host:www.baidu.com",        "Content-Type:application/x-www-form-urlencoded",//post请求        "Connection: keep-alive",        'Referer:http://www.baidu.com',        'User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; BIDUBrowser 2.6)');$ch = curl_init ();curl_setopt ( $ch, CURLOPT_URL, $url );curl_setopt ( $ch, CURLOPT_HTTPHEADER, $header );curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );// 执行$content = curl_exec ( $ch );if ($content == FALSE) {    echo "error:" . curl_error ( $ch );}// 关闭curl_close ( $ch );//输出结果echo $content;?></code>