How can PHP beginners effectively troubleshoot issues with displaying PHP variables in HTML files?

Issue: PHP beginners may encounter difficulties displaying PHP variables in HTML files due to syntax errors or incorrect usage of PHP echo statements. Solution: To effectively troubleshoot this issue, beginners should ensure that PHP variables are properly enclosed within PHP tags and echoed out using the correct syntax. Additionally, they should check for any typos or errors in variable names or echo statements.

<?php
$variable = "Hello, World!";
?>
<!DOCTYPE html>
<html>
<head>
    <title>Display PHP Variable</title>
</head>
<body>
    <h1><?php echo $variable; ?></h1>
</body>
</html>