getting function's argument names

Question

In PHP Consider this function:

function test($name, $age) {} 

I need to somehow extract the parameter names (for generating custom documentations automatically) so that I could do something like:

get_func_argNames('test'); 

and it would return:

Array['name','age'] 

Is this even possible in PHP?

Answer 1

You can use Reflection :

function get_func_argNames($funcName) {     $f = new ReflectionFunction($funcName);     $result = array();     foreach ($f->getParameters() as $param) {         $result[] = $param->name;        }     return $result; }  print_r(get_func_argNames('get_func_argNames'));   //output Array (     [0] => funcName ) 

Answer 2

It's 2019 and no one said this?

Just use get_defined_vars():

class Foo {   public function bar($a, $b) {     var_dump(get_defined_vars());   } }  (new Foo)->bar('first', 'second'); 

Result:

array(2) {   ["a"]=>   string(5) "first"   ["b"]=>   string(6) "second" }