PHP Tutorial

PHP SYNTAX

🧾 PHP Syntax

PHP scripts are written inside <?php ... ?> tags. These tags tell the server to interpret the enclosed code as PHP.

🧠 PHP is not case-sensitive for functions and keywords (like echo or IF), but variables are case-sensitive.

🔹 Basic Structure

A simple PHP script looks like this:

<?php
  // This is a single-line comment
  echo "Hello PHP!";
?>

📝 Syntax Rules

PHP code must be enclosed in <?php ... ?>
Statements end with a semicolon ;
Comments:
- // for single-line
- /* ... */ for multi-line
PHP files usually have a .php extension

🧪 Example: Mixing HTML with PHP

<!DOCTYPE html>
<html>
<body>

  <h1>PHP Test</h1>

  <?php
    echo "This line is from PHP!";
  ?>

</body>
</html>

🔄 PHP Comments

<?php
  // This is a single-line comment

  # This is also a single-line comment

  /*
    This is a multi-line comment
    useful for longer notes.
  */
?>

⚠️ Note: Always end PHP statements with a semicolon (;). Missing semicolons are a common beginner error!

🛠️ Quick Tips

Use proper indentation to make your code readable.
Start with echo and print to output content.
Use comments to explain your logic, especially when learning.

✅ Summary: PHP syntax is simple and clean. Begin every PHP script with <?php and use semicolons to end each command.

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