Why Is PHP Intelephense Reporting Undefined Symbols After Updating to Version 1.3?

PHP Intelephense Error: Undefined Symbol

Question:

After updating PHP Intelephense, developers are encountering an error that claims undefined symbols for routes and other classes, despite the code being correct.

Answer:

With version 1.3, Intelephense introduced diagnostics for undefined types, functions, and other symbols. Some frameworks make it difficult for static analysis engines to detect available symbols.

Solution:

To resolve this issue, consider the following:

• Install a stub generator like [laravel-ide-helper](https://github.com/barryvdh/laravel-ide-helper) to provide concrete definitions for symbols.
• Adjust Intelephense's configuration options in VSCode. Navigate to the settings UI and search for "intelephense." Set all undefined symbol options to false except "intelephense.diagnostics.undefinedVariables": true. This will revert Intelephense to version 1.2 behavior for undefined symbol detection.

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