PHP 8.x errors with Modx 3.0.4

[terrybarth]

I have modx 3.0.4 installed on Skytoaster hosting with php 7.4. Image thumbnails are not showing in the media manager or in the file list.

I searched the forum and found entries that say upgrading php to 8.x will fix this problem. However, when I do this Modx starts failing. The manager loads fine, but if I try to edit a resource I get a big red box that is filled with errors.

I tried every version of php 8.x, clearing the cache manually, etc. no change. When I revert back to 7.4 all is good except for the thumbnails.

Here’s what I see in the manager when I try to edit a resource.

Error: Class "finfo" not found

**Errors:**

* /home/xxxxxxx/public_html/core/vendor/league/mime-type-detection/src/FinfoMimeTypeDetector.php:48
* League\Flysystem\Local\LocalFilesystemAdapter->__construct() in /home/xxxxxxx/public_html/core/src/Revolution/Sources/modFileMediaSource.php:52
* MODX\Revolution\Sources\modFileMediaSource->initialize() in /home/xxxxxxx/public_html/core/src/Revolution/modElement.php:995
* MODX\Revolution\modElement->setSource() in /home/xxxxxxx/public_html/core/src/Revolution/modElement.php:981
* MODX\Revolution\modElement->getSource() in /home/xxxxxxx/public_html/core/src/Revolution/Processors/Element/TemplateVar/Renders/mgr/input/file.class.php:29
* modTemplateVarInputRenderFile->process() in /home/xxxxxxx/public_html/core/src/Revolution/modTemplateVarRender.php:72
* MODX\Revolution\modTemplateVarRender->render() in /home/xxxxxxx/public_html/core/src/Revolution/modTemplateVarInputRender.php:26

The error log also has errors. Mostly with list of these errors:

/home/xxxxxxxx/public_html/core/src/Revolution/modManagerResponse.php	160
PHP warning: Undefined array key “args”

[dejaya]

Could you check what PHP extensions are enabled on your PHP8.x versions?

MODX requires a few to be enabled to work properly.

[dejaya]

PS - the extension fileinfo may also be required.

[halftrainedharry]

@terrybarth

When I revert back to 7.4 all is good except for the thumbnails.

You can fix the thumbnail issue in PHP 7.4 by deleting the word mixed in one code file as described here:

MODX 2.8.6/3.0.4 + PHP 7.4 breaks thumbnails in the manager

Summary The version of phpThumb that comes with MODX 2.8.6 has a line of code that throws a fatal error in PHP 7.4. (The phpThumb library is used in the MODX manager to generate the thumbnails in the media browser and the preview for image TVs.) Step to fix the issue To fix the issue, remove the word mixed from this line in the file core/model/phpthumb/phpthumb.class.php Alternatively change the PHP version to at least 8.0. Related issue on Github Environment MODX 2.8.6-pl PHP 7.4

Might be easier than trying to make PHP 8 work.

[terrybarth]

dejaya

I most of those required extensions were enabled, so I enabled the remaining, but no change.

halftrainedharry

I may resort to that fix for the thumbnails, but it I’m more concerned about php 8 not working. At some point we’ll need to upgrade from 7.4

[halftrainedharry]

@terrybarth

but it I’m more concerned about php 8 not working.

Like @dejaya said, you seem to miss the fileinfo extension.

[terrybarth]

So it was enabled for 7.4, but when I switched to 8.1 it was not enabled. I just didn’t notice that. Once I enabled that, we’re good to go.

AND the image thumbnails are working.

Woo hoo!

As always, thank you!

[dejaya]

Glad you’re sorted!