software for php form validation

:confused:Iam a newbie to php and I designed a form similar to contact form . i need to validate it using php so i am in search of some software to do that task.can u suggest me some better one 2*thanks if u suggest a freeware

You need to write/use PHP code to validate each and every inputs, depending on the nature of the data. Google for php+form+validation (http://www.google.co.in/search?q=php+form+validation)