php模拟登录 获取SESSIONID，并则在读取网页的时候发送

php模拟登录的两种方法

方法1用curl：

一.先开启php curl函数库的步骤

1).去掉windows/php.ini 文件里;extension=php_curl.dll前面的;    /*用 echo phpinfo();查看php.ini的路径*/

2).把php5/libeay32.dll，ssleay32.dll复制到系统目录windows/下

3).重启apache

二.例子

例子:

<?php

$_jar = tempnam('./tmp','');

$ch = curl_init(); curl_setopt($ch,CURLOPT_URL,'http://******');

curl_setopt($ch, CURLOPT_POST, 1);

$request = 'email_address=&password=&action=';

curl_setopt($ch, CURLOPT_POSTFIELDS, $request);

//把返回来的信息保存在$_jar文件中

curl_setopt($ch, CURLOPT_JAR, $_jar);

//设定返回的数据是否自动显示

curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

//设定是否显示头信息

curl_setopt($ch, CURLOPT_HEADER, false);

//设定是否输出页面内容

curl_setopt($ch, CURLOPT_NOBODY, false);

curl_exec($ch);

curl_close($ch); //get data after login

$ch2 = curl_init();

curl_setopt($ch2, CURLOPT_URL, 'http://*****');

curl_setopt($ch2, CURLOPT_HEADER, false);

curl_setopt($ch2, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch2, CURLOPT_FILE, $_jar);

$orders = curl_exec($ch2);

echo '';

echo strip_tags($orders);

echo '';

curl_close($ch2); 

?>

方法2用fsockopen：

<?php

 GetWebContent($host, $method, $str, $sessid = '')

{ 

    $ip = gethostbyname($host); 

//echo "ip=$ip<br>";

    [email=$fp=@fsockopen($ip,80]$fp=@fsockopen($ip,80[/email]); 

    if (!$fp) return; 

    fputs($fp, "$methodrn"); 

    fputs($fp, "Host: $hostrn"); 

    if (!empty($sessid)) 

    { 

        fputs($fp, ": PHPSESSID=$sessid; path=/;rn"); 

    } 

    if ( substr(trim($method),0, 4) == "POST") 

    { 

        fputs($fp, "Content-Length: ". strlen($str) . "rn"); //  别忘了指定长度 

    }

    //fputs($fp, "Content-Type: application/x-www-form-urlencodedrnrn"); 

fputs($fp, "Content-Type: application/x-www-form-urlencodedrn"); 

fputs($fp, "User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; InfoPath.1)rn)");//add by Ew 071012

fputs($fp, "Connection: Keep-Alivernrn");

    if ( substr(trim($method),0, 4) == "POST") 

    { 

        fputs($fp, $str."rn"); 

    } 

    while(!feof($fp)) 

    { 

        $response .= fgets($fp); 

    } 

    $hlen = strpos($response,"rnrn"); // LINUX下是 "nn" 

    $header = substr($response, 0, $hlen); 

//echo "header=$header<hr><hr>";

    $entity = substr($response, $hlen + 4); 

    if ( preg_match('/PHPSESSID=([0-9a-z]+);/i', $header, $matches)) 

    { 

        $a['sessid'] = $matches[1]; 

    } 

    if ( preg_match('/Location: ([0-9a-z_?=&#.]+)/i', $header, $matches)) 

    { 

        $a['location'] = $matches[1]; 

    }

    $a['content'] = $entity;     

    fclose($fp); 

    return $a; 

}

  $response = GetWebContent("$host","POST /$login_page HTTP/1.0", $str);//登入得到新的session_id

  //...可以在这里先保存session_id

  $response = GetWebContent("$host","GET /$somepage HTTP/1.0", '', $response['sessid']);//使用session_id访问页面

  echo $response['location'].$response['content']."<br>"; 

?>