Limiting routing parameters for alphabets only in Laravel

We may use Regular Expression [[A-Za-z]+]+ to accept and parse out routing URL for alphabets only.

<?php

/*
 |--------------------------------------------------------------------------
 | Application Routes
 |--------------------------------------------------------------------------
 |
 | Here is where you can register all of the routes for an application.
 | It's a breeze. Simply tell Laravel the URIs it should respond to
 | and give it the controller to call when that URI is requested.
 |
 */

// will return 'Hello project root' on browser request /laravel/public
Route::get('/', function()
{
	return "Hello project root";
});

Route::get('person/{id}', function($id)
{
	return "Person : " . $id; 
})
->where('id', '[A-Za-z]+'); // using regular expression

Output

URL : laravel/public/person/aaaBB
Output : Person : aaaBB

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