Microsoft Visual Studio has a code completion feature called IntelliSense. It is one of many similar solutions that enable intelligent text or code completion across various platforms. The error “Undefined symbol ‘Route’. Intelephense” is a common error that can show up in many ways. In this blog, we will go through some of the ways you can fix this issue. Read on.

When Do You Get The Error “Undefined symbol ‘Route’. Intelephense”?

I will easily encounter the following error in your Visual Studio Code.

Undefined symbol 'Route'. Intelephense

How To Solve The Error “Undefined symbol ‘Route’. Intelephense”?

Method 1: Import the relevant namespace

To fix the error “Undefined symbol ‘Route’. Intelephense”. You must import the relevant namespace, such as Route from use Illuminate\Support\Facades\Route;. This error may be fixed by simply adding the relevant namespace.

A namespace is a declarative area that gives the names of the types, variables, functions, etc., inside a scope. Namespaces are used to classify code logically and avoid name clashes, mainly when your code base contains several libraries. At namespace scope, all identifiers are unconditionally visible to one another. Using the fully qualified name for each identifier, such as std::vector<std::string> vec;, or by using Declaration for a single identifier (using std::string), or using Directive for all the identifiers in the namespace, identifiers outside the namespace can access the members (using namespace std;). The fully qualified namespace name should always be used in the header file code.

Now, you just run the following command:

use Illuminate\Support\Facades\Route;

Method 2: Do as the following

If you receive the most recent version of PHP Intelephense, it will display an error message for a route with an undefined symbol (and other classes too). For example, you are running the following program:

Route::group(['prefix' => 'user', 'namespace' => 'Membership', 'name' => 'user.'], function () { 
    Route::get('profile', 'ProfileController@show')->name('profile.show'); 
    Route::patch('profile', 'ProfileController@update')->name('profile.update'); 
    Route::patch('change-password', 'ChangePasswordController@change')->name('change-password'); 
    Route::get('role', 'ProfileController@getRole')->name('profile.role'); 
    Route::get('summary', 'SummaryController@show')->name('summary'); 
    Route::get('reserved', 'AuctionController@reservedAuction')->name('reserved');
});

In contrast to version 1.2, which only had undefined variable diagnostics, version 1.3 of Intelephense now includes undefined type, function, constant, class constant, method, and property diagnostics. Some frameworks are designed to offer user-friendly shortcuts but make it challenging for static analysis engines to find symbols that are accessible at runtime. By giving specific definitions of symbols that are simple to find, stub generators like https://github.com/barryvdh/laravel-ide-helper assist close this gap. Using this with Laravel will eliminate many of the erroneous symptoms.

Nevertheless, PHP is a reasonably flexible language; thus, depending on how the code is written, there can be other occurrences of fake undefined symbols. Because of this, intelephense includes configuration options to enable or deactivate each type of undefined symbol to match the workspace and coding style since version 1.3.3.

Therefore, solutions forr you to fix your error is doing as the following:

'intelephense.diagnostics.undefinedTypes' 'intelephense.diagnostics.undefinedFunctions' 'intelephense.diagnostics.undefinedConstants' 'intelephense.diagnostics.undefinedClassConstants' 'intelephense.diagnostics.undefinedMethods' 'intelephense.diagnostics.undefinedProperties' 'intelephense.diagnostics.undefinedVariables'

Version 1.2 behavior can be achieved by setting all these to false except  intelephense.diagnostics.undefinedVariables. Look in the VSCode options UI and type “intelephense” to find it.

Conclusion

We hope that you will enjoy our article about the error. With this knowledge, we know that you can fix your error “Undefined symbol ‘Route’. Intelephense” quickly by following these steps! If you still have any other questions about fixing this syntax error, please leave a comment below. Thank you for reading!

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