Script for validating online order forms

Then, we also need to show which radio button that was checked.

Such code can now do no harm and is safe to be displayed on a page or inside an e-mail. if quotes are escaped with a slash \ let's remove that.

We will create a simple registration form which will contain various inputs like textbox, checkbox, radio buttons and a submit button.

After submitting the form, we will validate the fields with php and show error messages if there are some errors. The text input is a single line input accepting any normal text characters, but not linebreaks.

If the contents are too large to fit, the input will scroll, usually without a visible scrollbar.

attributes, which give a suggestion for an initial size (based on the number of characters that should be displayed vertically and horizontally).

The ability to interact with, and obtain information from web site visitors, is a central theme behind the Java Script language.

No Java Script book would be complete therefore, without exploring how to handle Graphical User Interface Components (GUI) objects such as buttons, text input fields, checkboxes, radio boxes and selections, together with the Form object which brings them all together. It acts a container for all of the GUI objects that make up a form.

This is an array containing all the objects in a Form (see Java Script Arrays for details on arrays).For example, the following HTML tags generate a form where a user can enter their first name, last name, and age, and includes a button for submitting information to a Web server.The form also contains an hidden input tag (not displayed by the Web browser) that you can use to pass additional information to a Web server.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.Later in the chapter we will learn how to create those objects inside the Form object.


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