[FIX] PHP deprecation notices break JSON responses in AJAX endpoints

[ga-devfront]

Questions	Answers
Description?	When running the autoupgrade module, PHP errors, warnings, and deprecation notices from vendor libraries or other sources are being output as HTML before JSON responses. This breaks the JSON parsing in JavaScript and causes operations to fail.
Type?	bug fix
BC breaks?	no
Deprecations?	no
Fixed ticket?	Internal issue
Sponsor company	@PrestaShopCorp
How to test?

To test use PS tag (for docker) = 9.0.0-8.4
and for .ini file with

display_errors = On
error_reporting = E_ALL

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[AureRita]

Hi @ga-devfront

Thank you for your PR, I tested it and it seems to works as you can see :

Capture.video.du.2026-01-09.16-12-01.mp4

check of logs :

Capture.video.du.2026-01-09.17-08-32.mp4

check of php :

Capture.video.du.2026-01-09.16-02-40.mp4

Starting the setup of an upgrade :

Capture.video.du.2026-01-09.17-08-32.mp4

Tested from :
docker 9.0.0-8.4

Because the PR seems to works as expected, It's QA ✔️

Thank you

[mcaldex]

hi @Quetzacoalt91 , when will version 7.6.0 be released?
This fix is essential, without it the module is unusable on 99%+ of installations I think.

[Quetzacoalt91]

Fortunately, not this many environments are concerned by this issue.

This PR solves the issue only for stores which are configured like this, in development mode:

display_errors = On
error_reporting = E_ALL

In the meantime, you may switch off display_errors or decrease the verbosity of the error report. I expect at least a month while we finish the rest of the expected changes.