form validation help

[hoponhiggo]

Hi

 

I am trying to expand on my current form validation code which is basic to say the least. the following code part of my registration form.

 

//form validation starts here
if(isset($_POST['username'])){
if($_POST['username'] == ""){
//username empty
die("You must enter a username");
}
} else {
//username not set
} 

if(isset($_POST['password'])){
if($_POST['password'] == ""){
//password empty
die("You must enter a password");
}
} else {
//password not set
} 

 

How can i expand on this to

 

a)echo the error messages on the same page?

b)ensure that passwords are a minimum amounts of characters?

 

Thanks

[voip03]

If you google it, you will get lot of info.

http://www.html-form-guide.com/php-form/php-registration-form.html

http://www.learnphponline.com/scripts/email-activation-for-php-forms

[IrOnMaSk]

i would put form in same file with the php file...

and start out by hiding the form...

so do the if statement like what you do and reveal the form when the condition is not met...

let me know if need help wit the code part