[RESOLVED] Project Mmorpg.

Popcorn

Hello my name is Mathew and i have a group of people with me ready to code and design a mmorpg and need some help with a few things, i hope you can take the time to give me a nice explanation unlike tutorials.

I have started to code the game code first, the backend as you like.

I really need a lesson on OOP i tried many different tutorials but they weren't good at explain and got me confused.

Anyways i made a new class called register and a function called checkpassword, this checks to see if the passwords are matching? What i would like to know is how i can code this?

This is what i currently have but i need some checking it over from a pro.

<?php

//  This is a class and function
//  structure for the game. 
//  Comments are added for 
//  understanding.

class formValidate{

var $pass;
var $pass2;

function checkpassword($pass, $pass2){
	if ($pass==$pass2) {
		echo "Passwords match";
	} else {
		echo "No match";
	}

}
}

?>

How do i use classes and functions in a new page ?

Thats what i have done, how do i, from the other page send the form variables over ?

Just a note : If anyone wants to help on the project then please do, we are lacking in php coders and we need some more experience.

Installer

From your form entry page pass the entries with either the "get" or the "post" method. On the validation page "include" the file containing your validation class. A common way to name this file is "Form_validation.class.php" (and a common way to name classes is with starting capital letters). Or just put the class in the same script.

Then instantiate the class. If you have your class like this, the checking would be done automatically:

class Form_validation
{ 
    var $valid; 

function Form_validation($user, $pword) 
{
    connect_to_db();
    $query = "SELECT * FROM my_table WHERE username = " . $user;
    $stored_password = mysql_result($result, 0, 'password');
    if ($pword == $stored_password) {
        $this->valid = true;
    } else {
        $this->valid = false;
    }
    disconnect_from_db();
} 
} 

$validation = new Form_validation($_POST['username'], $_POST['password']);
if ($validation->valid) {
    // Let in
} else {
    // Keep out
}

In production code you'd have error-checking and encoded passwords, etc.

Of course, it's a long way from being OOP, which is a fairly rigorous methodology that involves a lot more than just using classes.

Edit: Oops, left out the actual query; I'll leave that for you.

Popcorn

Thanks for the script but i didn't explain that i would like it to check the passwords in the form. Something like enter your password twice in the form?

But thanks for the script you gave anyway, it's giving me a better understanding of classes and functions.

Installer

Ok, I assumed too much, but it's still the same idea. To match two passwords just make some easy changes, back to close to what you had:

class Form_validation 
{ 
    var $valid; 

function Form_validation($pword_1, $pword_2) 
{ 
    if ($pword_1 == $pword_2) { 
        $this->valid = true; 
    } else { 
        $this->valid = false; 
    } 
} 
}

$validation = new Form_validation($_POST['pword_1'], $_POST['pword_2']); 
if ($validation->valid) { 
    // Let in 
} else { 
    // Keep out 
}

Popcorn

Thanks for the script, you helped a tiny bit of the game i'm developing. You should be proud! 🙂

2 more questions :- P

1 : Whats with having to use $this? I heard you have to use it and couldn't really understand it myself.

2 : If you had 2 functions then how do you call the second one? Because when you say

$validation = new Form_validation

Is that calling the class or the function?

Sorry for asking so much, i just really want to learn php.

Installer

When you call a class method or refer to a class variable, you need to do so through a class instance ("$my_instance->my_method", "$my_instance->my_variable"). The same goes inside the class code. But the class code is static--you can't or don't want to change it for every script or duplicate it for every instance. So "$this" is used as a stand-in.
A method with the same name as the class is called the class constuctor. Whenever you instantiate a class with "new", that constuctor is called automatically, if it exists. (In PHP 5 the method named "__constuct" is called first. If it doesn't exist, PHP 5 falls back to the same-name constuctor.)

You'd help yourself a lot by reading this and this.

hth