regex in route parameters

laravel-regex-in-route-params.php

<?php

// Do this (explicit routes are better):
Route::get('qualification', function () {/**/});
Route::get('qualification/{year}/{month}', function ($year, $month) {/**/});


// You could also do this (but don't in your case):
// @link https://laravel.com/docs/5.6/routing#parameters-regular-expression-constraints
Route::get('qualification/{year_month?}', function ($year_month = null) {
    if ($year_month) {
        [$year, $month] = explode('/', $year_month);
        return 'year: ' . $year . ', month: ' . $month;
    }
    
    return 'no year_month param';
    
// This will match '2018/05' but not '2018/5'
})->where('year_month', '\d{4}/\d{2}');
// This will match both:
})->where('year_month', '\d{4}/\d{1,2}');