为什么我的模拟登陆登陆时候验证码总是错误

Question

<?php    $curl=curl_init();
    $uri="http://jiaowu.em.swjtu.edu.cn/service/login.jsp?user_type=student";
    $verify_url="http://jiaowu.em.swjtu.edu.cn/servlet/GetRandomNumberToJPEG";
    $post_url="http://jiaowu.em.swjtu.edu.cn/servlet/UserLoginSQLAction";
    $cookie_file="cookie.txt";
    curl_setopt($curl,CURLOPT_URL,$uri);
    curl_setopt($curl,CURLOPT_CONNECTTIMEOUT,20);
    //curl_setopt($curl,CURLOPT_COOKIEJAR,$cookie_file);
    curl_setopt($curl,CURLOPT_COOKIEFILE,$cookie_file);
    curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
    $contents=curl_exec($curl);
    curl_close($curl);
    echo"获取cookie成功";
    $curl=curl_init();
    curl_setopt($curl,CURLOPT_COOKIEJAR,$cookie_file);
    curl_setopt($curl,CURLOPT_COOKIEFILE,$cookie_file);
    curl_setopt($curl,CURLOPT_CONNECTTIMEOUT,20);
    curl_setopt( $curl , CURLOPT_URL, $verify_url );
    curl_setopt( $curl , CURLOPT_HEADER, 0);
    curl_setopt( $curl , CURLOPT_RETURNTRANSFER, 1);
    $img = curl_exec( $curl );
    $fp=fopen("x.jpg","w");
    fwrite($fp,$img);
    fclose($fp);
    echo "获取图片成功";
    sleep(20);
    echo file_get_contents("verify.txt");
    $array=array(
        "url"=>"../servlet/UserLoginCheckInfoAction",
        "password"=>"456jj123",
        "OperatingSystem"=>"",
        "Browser"=>"",
        "user_id"=>"2015121613",
        "password"=>"19970826",
        "ranstring"=>file_get_contents("verify.txt"),
        "user_type"=>"student",
        "btn1"=>"",
    );    
    $curl=curl_init();
    curl_setopt($curl,CURLOPT_USERAGENT,"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36");
    curl_setopt($curl,CURLOPT_REFERER,"http://jiaowu.em.swjtu.edu.cn/service/login.jsp?user_type=student");
    curl_setopt($curl,CURLOPT_COOKIEFILE,$cookie_file);
    curl_setopt($curl,CURLOPT_URL,$post_url);
    curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
    curl_setopt($curl,CURLOPT_CONNECTTIMEOUT,20);
    curl_setopt($curl,CURLOPT_POSTFIELDS,$array);
    curl_setopt($curl,CURLOPT_POST,1);
    curl_setopt($curl, CURLOPT_HEADER, 0);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 0);
    $result =curl_exec( $curl);
    curl_close( $curl );
    echo "登陆成功";
我已经保存了session，为什么还是验证码错误

Answer 1

到php问答里问吧

Answer 2

你都没有获取验证码提交。和session有什么关系呢？

Answer 3

  $cookie_file="cookie.txt";
 curl_setopt($curl,CURLOPT_COOKIEFILE,$cookie_file);
你都没把文本里面的cookie 读出来

Answer 4

curl_setopt($curl,CURLOPT_COOKIEJAR,$cookie_file);
这句话不就是保存了session吗，也就是获取了cookie？求指导

Answer 5

curl_setopt($curl,CURLOPT_COOKIEJAR,$cookie_file);
这句话不就是保存了session吗，也就是获取了cookie？求指导

Answer 6

获取验证码是在一个session里进行的啊

Answer 7

他验证码是写session的，你获取cookie有什么用呢。

Answer 8

cookie不就相当于一个session id

Answer 9

看来楼主没弄明白什么是cookie

Answer 10

session_id与cookie没关系的，
session与cookie
参考：http://www.jb51.net/article/86351.htm