PHP function missing argument error

Question

My validate function looks like that

function validate($data, $data2 = 0, $type)
{
...

Function call example

if ($result =          


        

Answer 1

Missing argument 3 ($type) for validate()

Always list optional arguments as the last arguments. Since PHP doesn't have named parameters nor "overloading ala Java", that's the only way:

function validate($data, $type, $data2 = 0) {
}