Php code for validating username and password
At the start of the script, before any HTML, you can check whether the form has been submitted using attribute, and I’ve also marked whether or not the field is a required field for validation purposes.If the user does not comply with these rules, an error message will be displayed.Iain Tench has worked in the IT industry for 30 years as a programmer, project manager (Prince2 Practitioner), consultant, and teacher.
[back to top] To prevent bots from trying to guess the login info by brute force submission of a large number of common values, the visitor first has to prove they are human (by solving the CAPTCHA), and only then is their username and password submission checked against the authentication data store.
The loop would generate the HTML for the options on the fly, and the check if the option has been selected or not can be incorporated into it. It’s just one of those minor inconsistencies we have to live with.
One topic which I have not addressed and is outside the scope of this article is what you would do with the data after validation is successful.
There are a number of possibilities, including saving it in a database or emailing the data to yourself.
Whichever you choose, you need to be sure: Validation is essential, particularly if you are going to save the data in a database – remember the old saying, GIGO (Garbage In, Garbage Out), and you won’t go far wrong.
The goal is to teach you some basic HTML form elements and how their data is accessible to you in your PHP scripts.