What potential pitfalls should be considered when mixing HTML and JavaScript in PHP code?

One potential pitfall when mixing HTML and JavaScript in PHP code is the risk of code becoming messy and difficult to maintain. To address this, it is recommended to separate the HTML, JavaScript, and PHP logic into their respective sections to improve readability and organization. 

<?php
// PHP code
$data = "Hello, World!";
?>

<!DOCTYPE html>
<html>
<head>
    <title>Example</title>
</head>
<body>

    <p><?php echo $data; ?></p>

    <script>
        // JavaScript code
        var data = "<?php echo $data; ?>";
        alert(data);
    </script>

</body>
</html>

Keywords

HTML JavaScript PHP code XSS attacks security vulnerabilities

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