Guys...
I am new to web development.I need to learn form validation to create a sign up form.

I know basic PHP and MySQL to create a simple login and sign up systems but i don't know form validation much so i want to learn it from the beginning.If you have a tutorial or example or something like that to learn form validation please post it here.

Your post will help 100s of php beginners like me to start PHP development.



Thank you very much