CMPF123 - Chapter 6-2

Chapter Overview

• Subject: PHP: Hypertext Preprocessor for Form Data

• Course: CMPF 123: Introduction to Web Development

Learning Outcomes

• Understand how to get data from a form.

• Display and manipulate data from a form.

Topics Covered

Data Retrieval

• Retrieve form data using PHP.

• Manipulate form data using PHP.

PHP Form Handling

• Use superglobals: $_GET</code>, <code>$_POST to collect form data.

• Example:

  • HTML form with method POST.

  • PHP file with method GET.

Examples of HTML Forms & PHP Display

Example 1: Basic Form Handling

• myForm.html:

  • Contains input fields for Name and Email.

  • Submits data to welcome.php using POST method.

• welcome.php:

  • Displays user input fetched via $_POST.

Example 2: Complete Form Structure

• myForm.html:

  • Multiple input types (text, email, url, textarea, radio).

  • Action directs to display.php.

• display.php:

  • Receives and displays user input via POST superglobal.

Example 3: Additional HTML Form

• formInsert.html:

  • Gathers nickname, D.O.B., favorite color, hobbies, with proper validation.

  • Submits to mySelf.php.

• mySelf.php:

  • Processes the input, calculating age and displaying data accurately.

PHP Functions

Date Function

• Syntax: date(format , timestamp).

• Common characters:

  • d - Day of the month.

  • m - Month.

  • Y - Year in four digits.

  • l - Day of the week.

JavaScript Validation (Example 3)

• A script checks at least one checkbox is selected in form.

• Provides feedback to users for form validation.

Summary

• PHP effectively handles and manipulates form data using HTML forms.

• Various examples illustrate how to retrieve data and use it in web applications.