php使用curl请求数据（采集数据）

 1 <?php
 2 
 3 $url = "http://www.baidu.com/s?wd=刘俊涛的博客";
 4 
 5 $header = array(
 6     'User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36',
 7 );
 8 $ch = curl_init();
 9 curl_setopt($ch, CURLOPT_URL, $url);
10 curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
11 curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
12 // 执行
13 $content = curl_exec($ch);
14 if ($content == false) {
15     echo "error:" . curl_error($ch);
16 }
17 // 关闭
18 curl_close($ch);
19 
20 //输出结果
21 echo ($content);