To make the web browser check that a field is not empty, you will need to add a call to your validation function when the form is submitted.
To show the values in the input fields after the user hits the submit button, we add a little PHP script inside the value attribute of the following input fields: name, email, and website.
A submit button is created using the processing before outputting the input to form.
The As we mentioned in the previous section, the Form object is really just a container which contains other objects (such as text fields and buttons).
So, we need to always filter and validate the user entered before storing it in application’s database.
In this article, we will learn how to perform basic validation of form in php.
One way to access the elements in a Form is to use the Form object's elements property.
This is an array containing all the objects in a Form (see Java Script Arrays for details on arrays).