PrestaShop 1.6 has been released to the public and many people are upgrading their sites. One of the more common errors that we are seeing after upgrading or a new installation is a white screen. This is very distrubing to some people there is no error message telling you what is wrong. Most often, this is due to the program running out of the allowed memory. This is because PrestaShop 1.6 is a bit more memory intensive than previous versions. This article will demosntrate how to edit your php.ini file to fix the most common cause of the white screen error.

How to edit the php.ini file to fix the white screen error

  1. Log into your cPanel interface.
  2. Once in the cPanel, click on the File Manager icon located in the Files category.
  3. Once in the File Manager navigate to the folder where PrestaShop is installed. This is normally the public_html folder.
  4. Locate and then open the php.ini file for editing.
  5. Scroll or search through the file and locate the memory_limit setting. It is normally set to 32M, which means 32 MB. Change the setting to something larger, say 128M.
  6. Once changed, click the Save Changes button in the upper right corner.

Congratulations. The white screen should now be a thing of the past and you should see your PrestaShop 1.6 storefront.

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n/a Points
2014-05-28 12:06 am

Very good it was very helfull it fixed the white page error, i use prestashop 1.6

n/a Points
2014-07-31 2:20 pm
Well, it might not be the only reason for the white screen, seeming that my problem didn't go away by using this.
9,525 Points
2014-08-05 5:01 pm
Hello Lars,

Thank you for contacting us. Are you still experiencing issues?

We are happy to help but will need some additional information. What was the last thing you did before this started happening?

What version of PrestaShop are you using?

What Themes/Addons are you using?

Can you provide a link to your site, so we can replicate the error?

If you have any further questions, feel free to post them below.
Thank you,

n/a Points
2014-08-05 5:08 pm

I installed the latest version 1.6xxx and it worked fine. Then there was an upgrade, and after installing that, the problem arose. Now I have downgraded again and it works again.

I use the standard theme and didn't get very far developing the site, so there are nothing special there.

9,525 Points
2014-08-05 5:27 pm
Hello Lars,

Thank you for the additional information. As a test, I installed the the latest version of PrestaShop ( using Softaculous.

I was unable to replicate the blank screen problem on our servers. Since we are an Official PrestaSop partner, we like to stay on top of issues like this.

Putting PrestaShop in debugging mode may help provide a detailed error message.
I recommend contacting your hosting provider regarding this issue, since it may be related to a server setting.

If you have any further questions, feel free to post them below.
Thank you,

n/a Points
2014-08-05 4:36 pm

If this doesnt work you might also try editing the /config/ file with: ini_set('memory_limit', '512M');


This worked for me - Im a shared server so no direct access to php.ini file.


n/a Points
2014-08-05 5:25 pm

I upgraded and edited the config file, but it didn't work. White screen again.

You can see my shop at www.********.dk/presta 

9,525 Points
2014-08-05 5:43 pm
Hello Lars,

Thank you for providing a link to your blank page. I have marked out your domain name for security purposes.

I scanned your site using the free Sucuri scanner, and it detected malicious code on your website.

This could definitely be part of the problem. I would clean that before troubleshooting any further.

Please see my previous response, since it was posted after you asked this question.

If you have any further questions, feel free to post them below.
Thank you,

n/a Points
2014-08-06 1:27 am

Thanks John-Paul

i have passed your information on to my ISP, Hope they can help me get rid of the malware. I can't really see what it is from the Securi scanner.

n/a Points
2014-08-07 5:54 am

Hi I've just installed AvaTax module to my prestashop and after installing this module my front office screen gone blank:

I've tried to delete/uninstall that AvaTax module and it's not uninstalling but isntead giving me this error: [PrestaShop] Fatal error in module Module:

Uncaught exception 'ReflectionException' with message 'Class CartOverrideOriginal_remove53e34c24b3dc1 does not exist' in /home8/kaxus/public_html/classes/module/Module.php:2484 Stack trace: #0 /home8/kaxus/public_html/classes/module/Module.php(2484): ReflectionClass->__construct('CartOverrideOri...') #1 /home8/kaxus/public_html/classes/module/Module.php(2393): ModuleCore->removeOverride('Cart') #2 /home8/kaxus/public_html/classes/module/Module.php(592): ModuleCore->uninstallOverrides() #3 /home8/kaxus/public_html/modules/avalaratax/avalaratax.php(156): ModuleCore->uninstall() #4 /home8/kaxus/public_html/controllers/admin/AdminModulesController.php(645): AvalaraTax->uninstall() #5 /home8/kaxus/public_html/controllers/admin/AdminModulesController.php(1038): AdminModulesControllerCore->postProcessDelete() #6 /home8/kaxus/public_html/classes/controller/Controller.php(171): AdminModulesControllerCore->postProcess() #7 /home8/kaxus/public_html/classes/Dispatcher.php(373): ControllerCore->run() #8 /home8/kaxus/publi


I don't know what to do now and how to fix it, my experience in language and coding is none and also I have bluehost hosting and I can't even find php.ini anywhere in my File Manager in order to increase the default memory to something higher so it can fix the problem... please help me ASAP! 

19,427 Points
2014-08-07 9:15 am
Hello Kax,

If it is indeed a memory error that is causing the white screen, then increasing the memory limit in php.ini should help. If you do not have one in your hosting account, then the account is running off of the server default php.ini, which you will not have access to change.

You will want to contact your host and have them place a copy of it in your account, this way you can make changes to it. Also, be sure that you set the php.ini file to be recursive so that all the folders and files in your account will use it.

Kindest Regards,
Scott M
n/a Points
2014-09-08 5:20 pm


     I have multiple presta shop sites and always have friends looking for sites to be built.  I could use somebody of your knowledge to help me.  If you don't mind sending me a private email we can discuss a few current issues I am having.  Thank you



17,273 Points
2014-09-08 5:26 pm
Hello Anthony,

Apologies, but our Support Center is setup for support of software through replies and posts here on the website. Please post any questions along with information concerning the problem and we would be happy to help if we can.

Kindest regards,

Arnel C.

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