curl 获取数据的问题

看到总有人问curl的问题，这两天没事写了个采集论坛的小程序。里面包括了模拟登陆，获取页面源代码，正则匹配结果等部分，希望对大家有用。


<?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($code){
preg_match_all('/<!--[.|/r|/n]*?<a href=/"viewthread.php/?tid=(/d+)/',$code,$threads);
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($code){
preg_match('/<a href=/"space.php/?uid=/d+/" target=/"_blank/" id=/"userinfo/d+/" onmouseover=/"showMenu/(this/.id/)/">.+/',$code,$author_tmp);
$author = strip_tags($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';
$postfields='loginfield=username&amp;username=1nject10n&password=xxxxxx&questionid=0&cookietime=315360000&referer=http://bbs.war3.cn/&loginsubmit=提交';
request($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*/
?>