Limit username restrictions

Name: Limit username restrictions
Rating: 5 (1 reviews)
Author: UrbanTwitch

Ok, so basically, this is a helpful snippit for people who only want their visitors to be able to register with the following characters, a-z, A-Z, 0-9,_, and -.

Find in register.php:

PHP Code

$adduser = mysql_query("INSERT INTO `members` (`username`, `password`, `email`, `userlevel`) VALUES('$username','$password','$email','2')");
echo "You are now registered,<br><br>You can now loggin to your account";

Before it, add this:

PHP Code

if (ereg("^[a-zA-Z0-9_]{3,16}$",$username)) {

after it add this:

PHP Code

}else{ 
echo "You're username contains invalid characters.";
}

and viola, you're done.

So, your final product should be something along these lines:

PHP Code

if (ereg("^[a-zA-Z0-9_]{3,16}$",$username)) {
    $valid = true;
$adduser = mysql_query("INSERT INTO `members` (`username`, `password`, `email`, `userlevel`,`ip`, `signupdate`) VALUES('$username','$password','$email','2','$ip','$datex')");
echo "<h2>Success!</h2> You are now registered, $username. You can now <a href='https://avidpictures.com/beta/login.php>login</a> to your account!</a>";
 }else{
 	echo "Invalid username";
 	}

Any questions or help, post and I'll do my best to help you. Remember, this also works for other input fields!

Author:

UrbanTwitch

Views:

11,751

Rating:

Posted on Tuesday 18^th November 2008 at 11:44 PM

Jakkkay

Ill pay 20 bucks for a usersystem already made and can easily get installed by me :D if you ware interested email me at legitimateproductions@live.ca

Or add :D

Posted on Thursday 6^th November 2008 at 01:16 AM

Dava

for those who want preg_match just use the following

Code

if (preg_match("/^[a-zA-Z0-9_]{3,16}$/",$username)) {

Posted on Wednesday 8^th October 2008 at 01:27 PM

UrbanTwitch
UrbanTwitch's Avatar

Show me your code.

Posted on Wednesday 8^th October 2008 at 07:01 AM

jambomb

Doesnt seem to work ?

I tryd my username like %$%� $%�%^*((^ lol

Posted on Wednesday 8^th October 2008 at 05:28 AM

Matt

ereg is slow, why dont you use preg_match?