[PHP] How to echo something if not exist?

Hi all.. I want to echo something if the GET value was not exist in the database.. So for example : The user enters his email address and if this email was not found in the field of the email addresses in the table.. then echo Invalid Email Address So how to do it? Regards..

Re: [PHP] How to echo something if not exist?

Radwan Aladdin wrote: Hi all.. I want to echo something if the GET value was not exist in the database.. So for example : The user enters his email address and if this email was not found in the field of the email addresses in the table.. then echo Invalid Email Address So how to do it?