Different getPrefix() behavior for cached and non-cached routes

[kudashevs]

Laravel Version

10.45.1

PHP Version

8.1.27

Database Driver & Version

No response

Description

The getPrefix() method of the Illuminate\Routing\Route returns different values for non-cached and cached routes:

• /{locale} - the return value of the getPrefix() method for a non-cached route
• {locale} - the return value of the getPrefix() method for a cached route

This discrepancy in the results for non-cached/cached routes seems a sort of bug to me.

This issue might be related with #43882 and #43997.

Steps To Reproduce

After installing a new Laravel project, just add a route group to the web routes (the /routes/web.php file). For example:

Route::group([
    'prefix' => '{locale}',
    'where' => ['locale' => 'en|fr|de'],
], function () {
    Route::get('/', function () {
        return view('welcome');
    });
});

Then, use the tinker tool to get the registered routes and check the getPrefix() return values. Let's check the non-cacned routes:

$routes = app('router')->getRoutes()->get('GET');

foreach ($routes as $route) {
    dump($route->getPrefix());
}

The result is going to be:

Then, we can cache the routes with artisan route:cache command and use tinker again.

$routes = app('router')->getRoutes()->get('GET');

foreach ($routes as $route) {
    dump($route->getPrefix());
}

The result is going to be: