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PHP - Hello World

Introduction​

The "Hello World" program is a common starting point for beginners learning a new programming language. Let's dive into creating a simple "Hello World" program in PHP using XAMPP.

Prerequisites​

Ensure that you have XAMPP installed, which includes the Apache server and PHP module.

Writing and Running the Program​

  1. Open your preferred text editor.
  2. Save the following code as hello.php in the htdocs directory of your XAMPP installation.
<?php
   echo "Hello World!";
?>
  1. Start the Apache server from the XAMPP control panel if it's not already running.
  2. Open a new tab in your browser and enter http://localhost/hello.php as the URL.
  3. You should see the "Hello World" message displayed in the browser window.

Mixing HTML with PHP​

You can mix HTML and PHP code in a single script. For example:

<!DOCTYPE html>
<html>
<body>
   <h1>My PHP Website</h1>
   <?php
      echo "Hello World!";
   ?>
</body>
</html>

The "Hello World" message will be rendered as plain text, but you can include HTML tags inside the PHP code for formatting.

Running PHP Scripts from Command Prompt​

You can also run PHP scripts from the command prompt. Assuming you have a hello.php file with the following content:

<?php
   echo "Hello PHP!!!!!";
?>
  1. Add the path of the PHP executable (e.g., php.exe in XAMPP) to your operating system’s path environment variable.
  2. Open a command prompt and navigate to the directory containing hello.php.
  3. Run the script using the command:
php hello.php

You will see the output:

Hello PHP!!!!!
note

Ensure that XAMPP is properly configured and the Apache server is running to execute PHP scripts.