Beyond the perimeter is everything considered potential enemy territory which is...literally everything other than the literal code executed by the current request.All possible entrances and exits on the perimeter are guarded day and night by trigger happy sentries who prefer to shoot first and never ask questions.You can do more validation on Client-Side as per your need to make your code more secure.We submit the data from this HTML form to where we do Server-Side validation and then insert out data in database.In this tutorial we use both kind of validation technique to validate the form.We use Java Script for Client-Side Validation and PHP for Server-Side Validation. One Page - Portfolio and Business Word Press Theme Theme Onepage is a must-have single page Word Press theme.The first thing the form handler does is check that all the fields in our form, including the button, appear in the POST array. We also have more advanced functions for sending email.For public-facing forms you should add a CAPTCHA or similar device, as you can see in our Feedback form below, or risk being bombarded by spambots.
This perimeter protects the core business logic, processing and output generation.
By popular demand, here are some basic instructions for setting up a form handler in PHP to verify user input and send an email or display an error message in case the validation fails.
Here is the HTML and PHP code for the form we will be working with: The form will look something like the following - your basic no-frills feedback form: For testing purposes we've removed all the usual Java Script Form Validation and HTML5 Form Validation so the form can simply be submitted and validated by PHP on the server.
It prevents the form from being resubmitted if the landing page is reloaded, and allows us to display validation error messages inline using PHP.
Finally, the code includes PHP commands to re-insert any submitted values back in to the form so they don't have to be retyped in case of an error.