This Phase 1 video is an introductory PHP lesson recorded in 2020. It covers PHP in server-side development, how it works with HTML, setting up tools, variables, output, and receiving form data. This article follows the lesson’s sequence and separates historical details from current guidance.
Version note, updated October 16, 2026: The older lesson calls PHP 7.4.9 the latest version. That was information from 2020 and should not guide a current installation. PHP.net lists PHP 7.4 as an end-of-life branch and shows several PHP 8.x branches in its support table. Check the official table again before choosing a version for a project.
What the tutorial covers
- PHP runs on the server to create or process web pages, while HTML describes the structure and content displayed by a browser.
- Set up a programming environment, including PHP and a code editor. The instructor demonstrates the tools used at the time; that does not mean everyone must choose the same software.
- Start with PHP tags, variables, and output statements such as
echoorprint. - Learn how data from an HTML form is sent to a PHP script.
These topics still make a useful learning sequence, although menus, software interfaces, and versions shown in the video may have changed. The current PHP documentation provides an introduction, a first-page example, and a form tutorial to compare with the lesson.
Try PHP locally
- Install a PHP version that is currently supported according to PHP.net, then check it in a terminal with
php -v. - Create a file named
hello.phpand display a message with<?php echo "Hello"; ?>. - Use PHP’s documented local development server for testing. Do not expose the development server as a public web host.
- Practice with a form separately from a live system. Read values from
$_POSTcarefully, and check their types and values before using them.
Do not print form input directly into a web page
User input is external data. The PHP Manual recommends encoding special characters before displaying text in HTML. This example is for HTML text content only; JavaScript, URL, and SQL contexts require protections designed for those contexts.
<?php
$name = $_POST['name'] ?? '';
echo htmlspecialchars($name, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
?>Encoding text for display does not validate all input. A real system also needs appropriate validation, error handling, CSRF protection, and data-storage practices before it is put into service.
Use these parts of the video with care
- PHP 7.4.9: This is historical information from a 2020 lesson. Check the current support status before installing it.
- Software names and screens: These can change between software versions and operating systems. Follow the documentation for the tool you choose.
- Form example: It is for practicing how to read and display data, not a complete production-ready form.
What to learn next
After variables and output, continue with data types, conditions, loops, functions, form input, validation, database access through PDO, and sessions using the PHP documentation. Then build a small project that separates code from data and tests how it handles invalid input.
Video and learning resources
Open the original PHP Phase 1 video on YouTube. Browse videos from KongRuksiam Official.