laravel/framework[v8.12.3, ..., 8.x-dev] require php ^7.3|^8.0 -> your php version (7.2.33) does not satisfy that requirement. - Root composer.json requires laravel/framework ^v8.12.3 -> satisfiable by laravel/framework[v8.12.3, 8.x-dev] code example

Example: laravel 7 to 8 update code ?

Route::get('/profile/{location}', function ($location = null) {
    //
})->name('profile');

// Laravel 5.8: http://example.com/profile/active
echo route('profile', ['status' => 'active' => 'inActive']);

// Laravel 6.0: http://example.com/profile?status=active
echo route('profile', ['status' => 'active']);