Warning: Missing 1 argument

Question

Any idea why I get this error:

Warning: Missing argument 1 for person::__construct(), called in /home/fishbein/public_html/dev/OOP/index.php on line 5 and defined in /home/fishbein/public_html/dev/OOP/class_lib.php on line 6

Warning: Missing argument 1 for person::__construct(), called in /home/fishbein/public_html/dev/OOP/index.php on line 6 and defined in /home/fishbein/public_html/dev/OOP/class_lib.php on line 6

With this code:

<?
    class person {

            var $name;

            function __construct($persons_name) {       
            $this->name = $persons_name;        
            }

            function set_name($new_name) {
                $this->name = $new_name;
            }

            function get_name() {
                return $this->name;
            }

    }
?>

I'm also using this in my index file:

$tyler = new person("Tyler");

Answer 1

When instantiated you did: $obj = new person(); instead of $obj = new person("joe");

Answer 2

$persons_name = ""

Set it like this in argument. But that is not solution. You can remove construct, make new instance and then set name. If yours somehow doesn't work.