Adding validation to a form.

[al3x8730]

I own http://imshare.us.to  And I need help adding validation to the registration form. I'm willing to pay if need be. But if it's simple, I would appreciate the help. So if someone registers without a e-mail, password, etc... Make it reject, and tell the user what went wrong.

 

Thanks.

[Vermillion]

Well, there are many methods to do a validation system. Personally, I use custom class for that, but we can make a simple validation system without one:

 

Suppose you have the following form:

 

<form method="post" action="">
Username: <input type="text" name="username" /><br />
Password: <input type="password" name="pass" /><br />
Retype Password: <input type="password" name="pass2" /><br />
E-Mail: <input type="text" name="email" />
</form>

 

Now you have this PHP Script:

 

<?php

$username = $_POST['username'];
$pass = $_POST['pass'];
$pass2 = $_POST['pass2'];
$email = $_POST['email'];

if(strlen($username) < 3){ // If the username has less than 3 characters, print an error message and leave the script after that.
echo "Invalid username. It must have 3 characters or more.";
return 0;
}

if(strlen($pass) < 6){ // If the password has less than 6 characters, print a error message and leave the script.
echo "Your password must have 6 characters or more.";
return 0;
}

if($pass != $pass2){
echo "The passwords did not match. Please try again.";
return 0;
}

if(strlen($email) < 3){ // If the E-Mail has less than 3 scripts, print a message and leave the script.
return 0;
}

if(!preg_replace("/^([a-zA-Z0-9._-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-]+)+/", $email){ // If the E-Mail does not have a "@" or dot at the end, print a message and leave the script.
echo "Invalid E-Mail";
return 0;

//If there were no errors, you can put all your database stuff here.

?>

 

Obviously, this was made quickly and it is not reliable. With that script I don't even check for user input so SQL injection is something very easy to do. So probably you can fix the script and make it better. There are also many things I don't like from this script, so I would post my method, but it only works well for my custom forum. I'm sure you can modifty that though.

[al3x8730]

I have to go for a bit now, but later do you think it's possible that we talk talk on msn/aim or yahoo and you can help me setup my registration with validation? I'd really appreciate it, and as I said before, I can pay if needed.

[Vermillion]

Sure. My MSN is [email protected]

I don't think you can pay me for a number of factors, starting on my age ... But I'm sure we can find something small you can do for me.

[al3x8730]

I'm about to run out now, but I added you. Add me, [email protected]