problem with capcha code in my multiblog website

[mikhak]

hi.

i have a problem with captcha code in my multiblog website i using this cod for captcha but this cod only working in my index site and not working in blogs i can know this problem creating for session_start(); this item dont have any problem with my home page but not working in user blogs .

example :

http://example.com ====> nice working captcah

http://123.example.com ====> not working

http://abc.example.com ====> not working

http://efgh123.exapmle.com ====> not working

my cod :

<?php

session_start();

 $cap = $_POST['txtcap'];
if(isset($cap))
{
if(md5( $cap)== $_SESSION['key'] )
{

//other codes

}
else
{
echo 'error';
}

?>

my captcha creator codes :

<?php 
session_start();
$str=substr( md5( microtime() * time()),1,5);

$captcha = imagecreatefrompng("http://aytablog.com/buy/capchabg.png");
//get color
$black=imagecolorallocate($captcha,0,0,0);
$line=imagecolorallocate($captcha,233,239,239);

//draw line in pic
imageline($captcha,0,0,39,29,$line);
imageline($captcha,40,0,64,29,$line);

imagestring($captcha,5,20 ,10,$str,$black);
$_SESSION['key']=md5( $str);
("Content-type: image/png");
imagepng($captcha);

?>

please help me for solving this problem .

thank you.

[schwim]

Try:

<?php

$current_session = session_name("current_session");
session_set_cookie_params(0, '/', '.example.com');
session_start();

/* Rest of your code */

[mikhak]

schwim;11046143 wrote:

Try:

<?php

$current_session = session_name("current_session");
session_set_cookie_params(0, '/', '.example.com');
session_start();

/* Rest of your code */

thanks but not working . please help me another code. thank you

[mikhak]

problem solved by this edit :

http://example.com/buy/capchabg.png

changed to :

http://usetname.example.com/buy/capchabg.png

$captcha = imagecreatefrompng("http://usetname.example.com/buy/capchabg.png");