How to set optional parameter to default without passing it?

Question

How can i skip first argument without giving any value in function call,so that first argument can take default value NULL?

function test($a = NULL, $b = tru         


        

Answer 1

You can change the position of the arguments, or you can pass the arguments as an array, for exmaple:

test($options);

Answer 2

YOu have to use the format defined my the PHP function standards

test("",false);

The requirement you have works with jquery libraries...for arguments passing in its functions. But NOT in PHP

Answer 3

You cannot just skip an argument in PHP.

You may wish to consider the Perl trick and use an associated array. Use array_merge to merge the parameters with the defaults.

e.g.

function Test($parameters = null)
{
   $defaults = array('color' => 'red', 'otherparm' => 5);
   if ($parameters == null)
   {
      $parameters = $defaults;
   }
   else
   {
      $parameters = array_merge($defaults, $parameters);
   }
 }

Then call the function like this

Test(array('otherparm' => 7));

Answer 4

Redifine your function as

    function test($b = true,$a = NULL){
 //logic here
}

And you can call it like test(5); avoiding second parameter.