如何用PHP CURL功能查询

答案：用curl或fsockopen都可以或着你用file_get_contents更省劲直接把一个远程文件读到一个变量，然后你再分析这些数据，用正则preg_match把你需要用的数据取出来,采集就是这思路。
这里三个curl或fsockopen的例子，你可以参考一下
php抓取远程网页内容简单示例:www.phperz.com/php/php-article/061313K20081375.html
php中使用curl或fsockopen下载远程文件: www.phperz.com/php-promotion/Skills/030QT020091840.html
php的curl实现get和post
www.phperz.com/php/introduction/030QSR0091838.html以下是采集的实例，要想做好采集，需要先熟悉curl系列函数参数等，筛选你想要的东西，初级点的就看字符替换，高级点的就是正则了，请详看实例：
<?php 
set_time_limit(0);
//cookie保存目录 
$cookie_jar = '/tmp/cookie.tmp';
/*函数------------------------------------------------------------------------------------------------------------*/
//模拟请求数据 
function request($url,$postfields,$cookie_jar,$referer){ 
$ch = curl_init(); 
$options = array(CURLOPT_URL => $url, 
CURLOPT_HEADER => 0, 
CURLOPT_NOBODY => 0, 
CURLOPT_PORT => 80, 
CURLOPT_POST => 1, 
CURLOPT_POSTFIELDS => $postfields, 
CURLOPT_RETURNTRANSFER => 1, 
CURLOPT_FOLLOWLOCATION => 1, 
CURLOPT_COOKIEJAR => $cookie_jar, 
CURLOPT_COOKIEFILE => $cookie_jar, 
CURLOPT_REFERER => $referer 
); 
curl_setopt_array($ch, $options); 
$code = curl_exec($ch); 
curl_close($ch); 
return $code; 
}
//获取帖子列表 
function getThreadsList($code){ 
preg_match_all('/ <!--[.|\r|\n]*? <a href=>return $threads[1]; 
}
//判断该帖子是否存在 
function isExits($code){ 
preg_match('/ <p>指定的主题不存在或已被删除或正在被审核，请返回。 <\/p>/',$code,$error); 
return isset($error[0])?false:true; 
}
//获取帖子标题 
function getTitle($code){ 
preg_match('/ <h1>[^ <\/h1>]*/',$code,$title_tmp); 
$title = $title_tmp[0]; 
return $title; 
}
//获取帖子作者: 
function getAuthor($code){ 
preg_match('/ <a href=>$author = strip_tags($author_tmp[0]); 
return $author; 
}
//获取楼主发表的内容 
function getContents($code){ 
preg_match('/ <div id=\"postmessage_\d+\" class=\"t_msgfont\">(.|\r|\n)*? <\/div>/',$code,$contents_tmp); 
$contents = preg_replace('/images\//',' http://bbs.war3.cn/images/',$contents_tmp[0]);
return $contents; 
}
//打印帖子标题 
function printTitle($title){ 
echo " <strong> <h2>帖子标题: </h2> </strong>",strip_tags($title)," <br/> <br/>"; 
}
//输出帖子作者 
function printAuthor($author){ 
echo " <strong> <h2>帖子作者: </h2> </strong>",strip_tags($author)," <br/> <br/>"; 
}
//打印帖子内容 
function printContents($contents){ 
echo " <strong> <h2>作者发表的内容: </h2>",$contents," </strong> <br/>"; 
}
//错误 
function printError(){ 
echo " <i>该帖子不存在! </i>"; 
}
/*函数列表end---------------------------------------------------------------------------------------------------*/

/*登录论坛 begin*/ 
$url = ' http://bbs.war3.cn/logging.php?action=login';
$postfields='loginfield=username&username=1nject10n&password=xxxxxx&questionid=0&cookietime=315360000&referer= http://bbs.war3.cn/&loginsubmit=提交';
request($url,$postfields,$cookie_jar,''); 
unset($postfields,$url); 
/*登录论坛 end*/

/*获取帖子列表(位于第一页的帖子) begin*/ 
$url = ' http://bbs.war3.cn/forumdisplay.php?fid=57';
$code = request($url,'',$cookie_jar,''); 
$threadsList = getThreadsList($code); 
/*获取帖子列表 end*/
//帖子序列 
$rows = 0;
/*循环抓取所有帖子源代码 begin*/ 
foreach($threadsList as $list){ 
$url = " http://bbs.war3.cn/viewthread.php?tid=$list";
if(isExits($code)){ 
$code = request($url,'',$cookie_jar,''); 
$color = $rows%2==0?'#00CCFF':'#FFFF33'; 
echo " <div style='background-color:$color'>"; 
echo " <h1>第",($rows+1),"贴: </h1> <br/>"; 
$author = getAuthor($code); 
printAuthor($author);
$title = getTitle($code); 
printTitle($title);
$contents = getContents($code); 
printContents($contents); 
echo " </div>"; 
$rows++; 
} 
else 
printError();
echo "----------------------------------------------------------------------------------------- <br/> <br/>"; 
} 
/*抓取源代码 end*/ 
?>
php curl是收费的！！！！！！
加参数curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);


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