xdebug settings cannot be changed

dennis

It seems that DEVSENSE.phptools-vscode extension for Visual Studio Code is hardcoded to set up xdebug connection with specific parameters, which cannot be changed via configuration options.

Enabling internal logging in xdebug shows entries like this when the extension is enabled:

feature_set -i 2 -n max_data 8192

this effectively makes it impossible to observe (via xdebug) and copy variable values that are larger than 8kb, which is a very arbitrary choice of upper data limit.

Disabling the extension fixes this problem entirely.

MiloslavBeno

You’re right — max_data was hard-coded to 8192 due to older stability issues we encountered with Xdebug eval, where certain responses could become unreliable. That’s why the conservative limit was originally added.

We will update the extension so that settings from launch.json are properly merged with our defaults, and we will no longer override your custom max_data. If you set it manually, we’ll keep your value and log a warning that changing this setting may affect eval behavior in some cases — we will also verify this with the latest Xdebug versions.