Upgrading to php7.4 causes white screen

[tm2000]

Hi there.

I’m installing an extra which requires php 7.4 or higher.

I an running Modx 3.03 on php 7.3.

I changed the version to 7.4 in cPanel - but I just get a white screen of death!

Change back to 7.3, and all back to normal.

I’ve emptied the core/cache directory.

I can’t see anything in the error log to indicate the issue.

Any tips?

Thanks
Andy

[dejaya]

Have you checked that all required PHP extensions are still enabled when you change to 7.4?

The following extensions are required by MODX, or are commonly required by extras: zlib , json , gd , pdo (specifically pdo_mysql ), imagick , simplexml , curl , and mbstring .

[tm2000]

Thanks for your input.
To be honest, I don’ t know where to check this in cPanel.
I will contact the hosting company to see if they can tell me.

[tm2000]

I just turned on display_errors in the php.ini and got this:

 Fatal error: Uncaught Error: Class 'PDO' not found in /home/site/dev.site.co.uk/core/src/Revolution/modX.php:500 Stack trace: #0 /home/site/dev.ajcarart.co.uk/core/src/Revolution/modX.php(449): MODX\Revolution\modX->loadConfig('/home/site...', Array, Array) #1 /home/site/dev.site.co.uk/index.php(41): MODX\Revolution\modX->__construct() #2 {main} thrown in /home/site/dev.site.co.uk/core/src/Revolution/modX.php on line 500

So does this mean pdo_mysql is not installed?

Strange if it was fine on php7.3 though?

[dejaya]

cPanel can be configured in various different way so it’s not always a consistent experience between different users.

For me:

And then:

If you don’t see that - or any other links to PHP Extensions - then you may need to contact your hosting partner.

Hope that helps.

[tm2000]

Ah yes I can see that now - but all the required extensions are ticked.
Speaking to the hosting company now…

[bobray]

I assume you’ve tried deleting all files in the core/cache directory.

One other thing you could try is visiting with your browser in private or incognito mode to make sure it’s not a browser cache issue.

[tm2000]

Yes I did Bob.
After chatting with the hosting company it turned out to be caused by the wrong version of php7.4!
I originally use alt-php74 which is associated with the CloudLinux PHP selector.

They suggested is Use ea-php74 via MultiPHP Manager in CPanel, and it worked fine.

Not sure why why - but that was the solution!

And there’s me thinking php is php!

Leaving this here as the solution on the off-chance someone else has the same issue