Plain Code

<?php 

function myTestFunction($hasDefaultParamters = true)
{
    echo "Start\n";
    echo "num args: " . ($num = func_num_args()). "\n";
    
    if($num)
    {
        print_r(func_get_args());
    }
    echo "End\n";
}

myTestFunction("hello","world");
myTestFunction();

/*
output:
Start
num args: 2
Array
(
    [0] => hello
    [1] => world
)
End
Start
num args: 0
End
*/

function authenticate($u = null,$p = null,$redirect = 0){
        if ($numArgs = func_num_args() > 0){
            
            if($numArgs >= 2) {
                if($authID = User::__validCredentials($u,$p) {
            
                    $this->session->set_userdata(array('user_id'=>$authID));
                    return $authID;
                }
                else if ($redirect) {
                    
                    redirect('/login');
                    die("Redirecting...");
                }
            }
        }
        
        return 0;
        
    }