请教一个curl数据采集的问题
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<html><head>
<title>高校现代教学管理系统</title>
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<link href="%E9%AB%98%E6%A0%A1%E7%8E%B0%E4%BB%A3%E6%95%99%E5%AD%A6%E7%AE%A1%E7%90%86%E7%B3%BB%E7%BB%9F_files/css.css" type="text/css" rel="stylesheet">
</head>
<body onload="javascript:document.all.tbYHM.focus();document.all.tbYHM.select();">
<div align="center"><br><br><br>
<form name="Form1" method="post" action="default3.aspx" id="Form1">
<input name="__VIEWSTATE" value="dDw5NTI3MzM0NTQ7dDw7bDxpPDE+O2k8NT47PjtsPHQ8O2w8aTw4PjtpPDExPjs+O2w8dDxwPDtwPGw8b25jbGljazs+O2w8d2luZG93LmNsb3NlKClcOzs+Pj47Oz47dDxwPGw8VmlzaWJsZTs+O2w8bzxmPjs+Pjs7Pjs+Pjt0PHA8bDxWaXNpYmxlOz47bDxvPGY+Oz4+Ozs+Oz4+O2w8aW1nREw7aW1nVEM7aW1nUU1NOz4+iyfPvg3FujyU8xX773LO/CbCuTw=" type="hidden">
<table cellspacing="0" height="440" background="%E9%AB%98%E6%A0%A1%E7%8E%B0%E4%BB%A3%E6%95%99%E5%AD%A6%E7%AE%A1%E7%90%86%E7%B3%BB%E7%BB%9F_files/kjxy3_bj.jpg" border="1" cellpadding="0" width="778">
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<td height="440">
<table cellspacing="0" align="center" border="0" cellpadding="0" width="778">
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<td height="55" width="778"></td>
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<tr>
<td height="100" background="" valign="bottom">
<table cellspacing="0" border="0" cellpadding="3" width="100%">
<tbody><tr>
<td height="33" width="100">
<div align="right"><img src="%E9%AB%98%E6%A0%A1%E7%8E%B0%E4%BB%A3%E6%95%99%E5%AD%A6%E7%AE%A1%E7%90%86%E7%B3%BB%E7%BB%9F_files/name.gif" height="16" width="11"> 用户名：</div>
</td>
<td height="33" width="120">
<input value="K061141026" name="tbYHM" id="tbYHM" type="text">
</td>
<td height="33" width="80">
<div align="right"><img src="%E9%AB%98%E6%A0%A1%E7%8E%B0%E4%BB%A3%E6%95%99%E5%AD%A6%E7%AE%A1%E7%90%86%E7%B3%BB%E7%BB%9F_files/mm.gif" height="12" width="11"> 密 码：</div>
</td>
<td height="33" width="120">
<input name="tbPSW" id="tbPSW" type="password">
</td>
<td height="33" width="100">
<select name="ddlSF" id="ddlSF">
<option selected="selected" value="－请选择－">－请选择－</option>
<option value="访客">访客</option>
<option value="学生">学生</option>
<option value="教师">教师</option>
<option value="部门">部门</option>
</select>
</td>
<td width="40"> </td>
<td width="200">
<input name="imgDL" id="imgDL" src="%E9%AB%98%E6%A0%A1%E7%8E%B0%E4%BB%A3%E6%95%99%E5%AD%A6%E7%AE%A1%E7%90%86%E7%B3%BB%E7%BB%9F_files/login.gif" alt="请问一个curl数据采集的有关问题" border="0" type="image"><input name="imgTC" id="imgTC" onclick="window.close();" src="%E9%AB%98%E6%A0%A1%E7%8E%B0%E4%BB%A3%E6%95%99%E5%AD%A6%E7%AE%A1%E7%90%86%E7%B3%BB%E7%BB%9F_files/longout.gif" alt="请问一个curl数据采集的有关问题" border="0" type="image"><input name="imgQMM" id="imgQMM" src="%E9%AB%98%E6%A0%A1%E7%8E%B0%E4%BB%A3%E6%95%99%E5%AD%A6%E7%AE%A1%E7%90%86%E7%B3%BB%E7%BB%9F_files/getps.gif" alt="请问一个curl数据采集的有关问题" border="0" type="image">
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</form>
</div>
<div class="xglj">
<em>相关连接：</em> <a href="http://211.67.32.51/xsxjxtdl.aspx" id="HLxsxj">学籍信息查询系统</a> </div>
</body></html>
这是登录界面的html代码
<?php
header ( "content-Type: text/html; charset=utf-8" );
require_once 'search.php';
// 第一步:提交数据,生成cookie,将cookie保存在临时目录下
$cookiejar = realpath ( 'cookie.txt' );
$id=$_GET['id'];
$password=$_GET['password'];
$year=$_GET['year'];
$term=$_GET['term'];
$ch = curl_init ();
$login_url = "http://211.67.32.51/";
$curlPost = "__VIEWSTATE=dDw5NTI3MzM0NTQ7dDw7bDxpPDE%2BO2k8NT47PjtsPHQ8O2w8aTw4PjtpPDExPjs%2BO2w8dDxwPDtwPGw8b25jbGljazs%2BO2w8d2luZG93LmNsb3NlKClcOzs%2BPj47Oz47dDxwPGw8VmlzaWJsZTs%2BO2w8bzxmPjs%2BPjs7Pjs%2BPjt0PHA8bDxWaXNpYmxlOz47bDxvPGY%2BOz4%2BOzs%2BOz4%2BO2w8aW1nREw7aW1nVEM7aW1nUU1NOz4%2BiyfPvg3FujyU8xX773LO%2FCbCuTw%3D&tbYHM=K061141026&tbPSW=100311&ddlSF=学生&imgDL.x=0&imgDL.y=0";
curl_setopt ( $ch, CURLOPT_URL, $login_url );
// 启用时会将头文件的信息作为数据流输出
curl_setopt ( $ch, CURLOPT_HEADER, 0 );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt ( $ch, CURLOPT_REFERER, 'http://211.67.32.51/' );
curl_setopt ( $ch, CURLOPT_POST, 1 );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $curlPost );
// 设置连接结束后保存cookie信息的文件
curl_setopt ( $ch, CURLOPT_COOKIEJAR, $cookiejar );
$data=curl_exec ( $ch );
$data = mb_convert_encoding ( $data, "utf-8", "gb2312" );
echo $data;
//echo '<xmp>'.search3($id,$year, $term,$ch).'</xmp>';
?>
这是我写的模拟服务器登录的PHP文件
这是用firebug抓到的post数据和头信息，现在遇到的问题是每次执行这个文件时，都是返回“请选择角色”，而我上面的ddlSF的属性给了值呀，请问问题出在哪里
Curl 行业数据 HTML URL
[解决办法]
$curlPost = "__VIEWSTATE=dDw5NTI3MzM0NTQ7dDw7bDxpPDE%2BO2k8NT47PjtsPHQ8O2w8aTw4PjtpPDExPjs%2BO2w8dDxwPDtwPGw8b25jbGljazs%2BO2w8d2luZG93LmNsb3NlKClcOzs%2BPj47Oz47dDxwPGw8VmlzaWJsZTs%2BO2w8bzxmPjs%2BPjs7Pjs%2BPjt0PHA8bDxWaXNpYmxlOz47bDxvPGY%2BOz4%2BOzs%2BOz4%2BO2w8aW1nREw7aW1nVEM7aW1nUU1NOz4%2BiyfPvg3FujyU8xX773LO%2FCbCuTw%3D&tbYHM=K061141026&tbPSW=100311&ddlSF=学生&imgDL.x=0&imgDL.y=0";
$curlPost = iconv("UTF-8", "GBK", $curlPost);