Yahoo login using curl

Following code can be useful if you are trying to sync your custom php calendar with yahoo calendar using curl. Please check php manual for detailed description about setting curl options. The script for login to yahoo using curl in php is simple and short and can be of help at times for developers like me.

    $serviceUrl = "http://calendar.yahoo.com/";
    $authUrl    = "http://login.yahoo.com/config/login?";
    $userAgent  = "YahooSeeker-Testing/v3.9 (compatible; Mozilla 4.0; MSIE 5.5; http://search.yahoo.com/)";
    $referer    = "http://my.yahoo.com";
    $login      = "yourusername";
    $password   = "yourpassword";
    $numPostData = 22;
    $cookieFileJar  = "cookie.txt";
    $cookie = 0;
    $postData = "login=$login&passwd=$password&.src=&.tries=5&.bypass=&.partner=&.md5=&.hash=&.intl=us&.tries=1&.challenge=ydKtXwwZarNeRMeAufKa56.oJqaO&.u=dmvmk8p231bpr&.yplus=&.emailCode=&pkg=&stepid=&.ev=&hasMsgr=0&.v=0&.chkP=N&.last=&.done=" . $serviceUrl;

    $ch = curl_init();
    curl_setopt($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, $postData);

    //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, $cookieFile);

    //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, 1);

 //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);
 
 //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";
    }
?>