How does PHP generate HTML code and why is HTML knowledge important for PHP development?

PHP generates HTML code by embedding HTML content within PHP code using echo statements or by switching between PHP and HTML modes. HTML knowledge is important for PHP development because PHP is often used to dynamically generate HTML content based on user input or database queries. Understanding HTML allows PHP developers to create well-structured and visually appealing web pages.

<?php
// Example PHP code generating HTML content
$name = "John";
echo "<h1>Welcome, $name!</h1>";
?>