Anyone who can help me validate a login file or any tips for security validation and using variables any tips for php programming
Validate a login file? Post your current code and we'll tell you how to improve it. If there's such code? If not, try to explain more detailed what you're trying to achieve.
you should check out the book 'php and mysql for dynamic websites'. there is a companion website that has a zip files of all the books scripts. the book completely covers login and registering accounts.