What is the purpose of using variables in a URL in PHP?

Using variables in a URL in PHP allows for dynamic content to be passed through the URL and accessed in the PHP script. This can be useful for passing data between pages, creating dynamic links, or implementing search functionality. By using variables in a URL, you can make your website more interactive and user-friendly.

// Example of using variables in a URL in PHP
// URL: example.com/page.php?id=123

$id = $_GET['id']; // Retrieve the value of 'id' from the URL

// Use the variable in your PHP script
echo "The ID passed in the URL is: " . $id;