Save this file as test.php in the C:\xampp\htdocs directory on Windows or /opt/lampp/htdocs on macOS/Linux. Open a web browser and navigate to http://localhost/test.php . You should see the output "Hello, World!".

PHP 7.4 requires specific extensions for certain tools. In the same php.ini file, ensure the following lines do not have a semicolon ( ; ) at the start: extension=intl extension=gd2 extension=bcmath extension=soap Step 4: Common Issues and Fixes Port Conflicts

Click and follow the prompts until the installation process completes. Step 3: Verify the PHP Version Launch the XAMPP Control Panel. Click the Start buttons next to Apache and MySQL.

This usually happens if the database files become corrupted or if another instance of MySQL is running on port 3306.

Choose an installation directory. Pro tip: Avoid "Program Files" on Windows to prevent permission issues; C:\xampp74 is a popular choice. Complete the wizard and launch the XAMPP Control Panel. Configuring Your Environment Setting Up PHP Environment Variables

You can find PHP 7.4 versions (such as XAMPP 7.4.33) in the Apache Friends older downloads section.

Change the default MySQL root user password from blank to a secure phrase via phpMyAdmin.

If Apache fails to start, it is usually because Port 80 is being used by another program (like Skype or VMware).

Choose your operating system folder ( XAMPP Windows , XAMPP Mac OS X , or XAMPP Linux ).

Select the components you need. At a minimum, choose Apache, MySQL, and PHP.

Select English (or your preferred language) and click "Next".

had a classic problem: they were tasked with maintaining a legendary legacy project that was written in the golden era of

Look at the top of the page. It should explicitly state .

Download the portable version of XAMPP with PHP 7.4 instead of the installer executable.

For PHP 7.4 to run smoothly, you may need to adjust php.ini (found via the button in the Control Panel):

Verify that the page explicitly states at the top. Step 4: Configuring PHP 7.4 for Development