Can't log in to Magento Admin
Solution 1:
I managed to fix it! I found this solution here: http://blog.chapagain.com.np/magento-admin-login-problem/.
I wanted to know why that fixed it though and var_dumped the items I commented out and realized that the cookie domain was being set to just '/' and we have magento set up under '/shop/'. So I went to the configuration section (having managed to log in after commenting out the 3 lines mentioned in the article), changed the Cookie Domain and Cookie Path to be blank and saved. I then uncommented those lines and tried again and all's working well!
Solution 2:
In new Magento Installation, do the following ->
Open the file
app/code/core/Mage/Core/Model/Session/Abstract/Varien.php.
and change the code at line 87 to this ->
$cookieParams = array(
'lifetime' => $cookie->getLifetime(),
'path' => $cookie->getPath(),
// 'domain' => $cookie->getConfigDomain(),
// 'secure' => $cookie->isSecure(),
// 'httponly' => $cookie->getHttponly()
);
Solution 3:
I have also encountered this issue. This is what I did : In core_config_data, delete any rows where path = web/cookie/cookie_domain
Solution 4:
Just clear cookies and cache in web browser. It works for me perfectly.