Laravel5 route transmits value to function

For example, if the Controller has a function {code...}, how does one call the Controller's test (& #039; abc & #039;) when routes. php defines getabc ;)? You do not need to use generic variables such as Route: get ({var} & #039;, function ($ var)..., because the value of $ var is fixed. For example, a Controller function is

public function test($var) {    //some code...}

How to define get in routes. php/abcWhen calling Controllertest('abc')?
Do not use generic variables suchRoute::get(/{var}', function($var)...In this form, because the value of $ var is fixed.

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For example, a Controller function is

public function test($var) {    //some code...}

How to define get in routes. php/abcWhen calling Controllertest('abc')?
Do not use generic variables suchRoute::get(/{var}', function($var)...In this form, because the value of $ var is fixed.

Route::get('/{var}',function($var){    return $var;})->where('var','a|b|c|d|e|f|g');

RequestObjects can also be obtained.

// URL: /portal/orders/2public function _test(Request $request){    // 1: portal    // 2: orders    // 3: 2    return Request::segment(1);}