用到了强大的curl库。
代码：
<html> <head> <meta http-equiv="Content-Type" content="text/html;charset:UTF-8"> <title>sh</title> </head> <body> <form action="search.php"> <input type="text" name="find" size="50"/> <input type="submit" name="submit" value="search"/> </form> </body> </html>
<?php
if(isset($_GET['find']))
{
$cv=$_GET['find'];
$nw=urlencode($cv);
$ch=curl_init();
curl_setopt($ch,CURLOPT_URL,"http://www.baidu.com/s?wd=".$cv."&pn=0");
curl_setopt($ch,CURLOPT_HEADER,0);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
$output=curl_exec($ch);
curl_close($ch);
echo $output;
}
?>