What are some potential challenges when integrating PHP with HTML in Visual Studio 2019?

One potential challenge when integrating PHP with HTML in Visual Studio 2019 is that the editor may not provide syntax highlighting or code completion for PHP within HTML files. To solve this, you can use the PHP Tools extension for Visual Studio, which adds full PHP support to the editor.

<?php
// Your PHP code here
?>
<!DOCTYPE html>
<html>
<head>
    <title>PHP in HTML</title>
</head>
<body>
    <h1><?php echo "Hello, World!"; ?></h1>
</body>
</html>