Proceed to checkout not working after upgrade to php 5.5

[JCase]

Hello everyone,

Im busy building a site and in the middle of this process my hoster decided to upgrade the php version on the server from 5.3 to 5.5.25.

and now when i have items in my shopping cart and want to "proceed to checkout" it just keeps reloading my shopping cart page.

before this upgrade everything worked normally.

I use:

Magento CE 1.9.1.1 with latest patches

PHP 5.5.25

MySQL  5.5.40

I already tried the following:

* switching back to the default  theme but this problem exists in all installed themes

* cleared the magento cache

* checked file rights on the server

* searched the forum for similar problems

I also noticed that when i am logged in as a customer the "proceed to checkout" button works normally.

Anyone who can point me in the right direction ? I have almost no magento / php experience but  i am an experienced systems admin.

Thanx in advance 

[Suma Tata]

Disable your current theme and check the "Proceed to checkout" in base theme. If it works with base theme then you may easily find out the solution.

[JCase]

I have already tried switching to the base theme and that does not work. I just installed a fresh magento CE 1.9.1.1 on the same hosting server and just added 1 product in it to test and i can confirm that this problem is caused by the upgrade to PHP 5.5.25.

I will try to do a fresh magento install on another server with a different version of PHP just to double check.

[BSAS]

Hi Jcase,

Were you able to find a solution to this problem?