php - How to suppress error if an argument is missing in a function call? -

i made function (no need write whole function here) :

public function selectnode($from, $attributes = null, $childs = null) 

and, of course, if call way :

$node->selectnode(); 

the argument $from isn't initialized , got warning error. know can suppress error doing @$node->selectnode(); or @.

but, want handle myself. how can that if that's possible?

the way found initialize public function selectnode($from = null, $attributes = null, $childs = null) doesn't make clear ($from not option others).

(and, of course, function, here, example. extended other functions)

you use try-catch block handling error yourself.

try {   $node->selectnode(); } catch (exception $e){   echo $e; // whatever here error info $e, if leave parenthesis empty here nothing done , error message suppressed }