[5.2] Pre-update check for extensions AllowDynamicProperties

[alikon]

Pull Request for Issue #44284 .

Summary of Changes

added #[\AllowDynamicProperties]

Testing Instructions

see #44284 .

Actual result BEFORE applying this Pull Request

deprecation

Expected result AFTER applying this Pull Request

no more derepcation

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[Hackwar]

Please add the necessary attributes instead of hiding the error with this code.

[alikon]

the only way I was able to reproduce the issue, has been to add a non standard "tag" <updatefromcli>false</updatefromcli> in the updateserver xml file

so we don't know the exact non standard tags that are defined in the updateserver xml file of the extensions for @obuisard it was <length></leght> i suspect, so to avoid errors the #[\AllowDynamicProperties] could be a good solution imho

[obuisard]

I have found the extension that has <length> in the update server file and it's a VERY popular extension.
My point is, it will be happening on a lot of sites that have error reporting enabled.

[richard67]

@obuisard Does this PR close your issue?