Laravel expression route parameters must

 In Laravel, you can define route parameters using curly braces {} in your route definitions.

These parameters allow you to capture values from the URL and pass them to your controller methods for further processing.

Here's a basic example of how to define and use route parameters in Laravel:

Route::get('/user/{id}','UserController@show');

In this example, {id} is a route parameter that will capture whatever value is in the URL segment at that position.

1) Parameters must be pass alphabet other wise give 404

=> example

   Route::get('/user/{name}', function ($name)   {

 })->where('name', '[A-Za-z]+');

    

2) must be pass numeric parameters

Route::get('/user/{id}', function ($id) {

    //

})->where('id', '[0-9]+');

3) must be pass numeric and name must be alphabet parameters

 

Route::get('/user/{id}/{name}', function ($id, $name) {

    //

})->where(['id' => '[0-9]+', 'name' => '[a-z]+']);

For convenience, some expression patterns have helper methods 

  

Route::get('/user/{id}/{name}', function ($id, $name) {

    //

})->whereNumber('id')->whereAlpha('name');

 

Route::get('/user/{name}', function ($name) {

    //

})->whereAlphaNumeric('name');

 

Route::get('/user/{id}', function ($id) {

    //

})->whereUuid('id');

 

Route::get('/user/{id}', function ($id) {

    //

})->whereUlid('id');

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Route::get('/category/{category}', function ($category) {

    //

})->whereIn('category', ['movie', 'song', 'painting']);