Help with cURL script for yahoo login

[lucky_che]

i am new to curl .and i m trying to create create a script to log into yahoo and click the confermation link in emails.
but i am stuck witht he login process only
i made the code below . but still i cant make it work. the problem is yahoo is implementing a captcha challange for this kind of automated headers. do you have any idea ho to make it work again without alerting the captcha challange ?

the header i caught through the livehttp header is as follows:

Content-Length: 347
.tries=1&.src=ym&.md5=&.hash=&.js=&.last=&promo=&.intl=in&.bypass=&.partner=&.u=4ls6cr96lbs8e&.v=0&.challenge=W9w31pCrbdazCcY4mH41fVsyxwd8&.yplus=&.emailCode=&pkg=&stepid=&.ev=&hasMsgr=0&.chkP=Y&.done=http%3A%2F%2Fmail.yahoo.com&.pd=ym_ver%3D0%26c%3D%26ivt%3D%26sg%3D&pad=1&aad=1&login=myyahooid&passwd=mypassword&.persistent=y&.save=&passwd_raw=

<?php

    
    $authUrl    = "https: //login.  yahoo  .   com/config/login?";
    $userAgent  = "Mozilla/5.0 (Windows NT 5.1; rv:2.0b11) Gecko/20100101 Firefox/4.0b11";
    $referer    = "http  :  //  my  .  yahoo  .  com";
    $login      = "userid";
    $password   = "password";
    $numPostData = 22;
    $cookieFileJar  = "ycookie.txt";
    $cookie = 0;
    $postData = ".tries=1&.src=ym&.md5=&.hash=&.js=&.last=&promo=&.intl=in&.bypass=&.partner=&.u=4ls6cr96lbs8e&.v=0&.challenge=W9w31pCrbdazCcY4mH41fVsyxwd8&.yplus=&.emailCode=&pkg=&stepid=&.ev=&hasMsgr=0&.chkP=Y&.done=http%3A%2F%2Fmail.yahoo.com&.pd=ym_ver%3D0%26c%3D%26ivt%3D%26sg%3D&pad=1&aad=1&login=$login&passwd=$password&.persistent=y&.save=&passwd_raw=" ;

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);

    // Set the referrer
    curl_setopt($ch, CURLOPT_REFERER, $referer);

    // Set the authentication url
    curl_setopt($ch, CURLOPT_URL, $authUrl);

    // Set number of post fields
    curl_setopt($ch, CURLOPT_POST, $numPostData);

    //Set post data in key=value pair such as login=yourusername
    curl_setopt($ch, CURLOPT_POSTFIELDS, $numPostData);

    //Set filename for storing cookie information
    curl_setopt($ch, CURLOPT_COOKIEJAR, $cookieFileJar);

    //Set ffilename for checking the stored cookie information
    curl_setopt($ch, CURLOPT_COOKIEFILE, $cookieFileJar);

    //Set option for cookie
    curl_setopt($ch, CURLOPT_COOKIE, $cookie);
 
 //set this to output the result as string and not output directly ot browser
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);

 //set this value to 1 if you want to redirect to the url you provided as service url
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);
 
 //Set this option if you do not want to verify ssl
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
 
 //set this option if you do not want to verify peer's certificate
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
 
 //now execute the curl
    $res = curl_exec($ch);
     echo $res;
 //check if the username and password is valid
    if ((preg_match("/invalid/i", $res)) || (preg_match("/not yet taken/i", $res))) {
        echo "Invalid Login";
    }
    else {
  //if  CURLOPT_FOLLOWLOCATION is set to 1 then after logging in successfully user is directed to url that is specified as service url
        echo "Logged In";
    }
?>

then i have to work for clicking confermation links in mails. please suggest me some ways.i would be very grateful to you

[PeejAvery]

Good, so you know that Yahoo security is working. Site's implement captcha to keep hackers from using automated logins and brute force attacks. And, there are probably dozens of reasons as to why Yahoo would require a captcha for specific logins.

Why don't you look near the bottom of this Experts Exchange post.