What are the potential pitfalls of integrating a JavaScript-heavy component like FCKeditor into a PHP CMS system?

One potential pitfall of integrating a JavaScript-heavy component like FCKeditor into a PHP CMS system is the risk of conflicts between the JavaScript code and the PHP code. This can lead to unexpected behavior, errors, or performance issues. To solve this, it is important to properly manage the integration by ensuring that the JavaScript code is properly loaded and executed within the PHP environment.

// Example of properly integrating FCKeditor into a PHP CMS system
<html>
<head>
    <script src="fckeditor.js"></script>
</head>
<body>
    <form method="post" action="submit.php">
        <textarea name="content" id="editor"></textarea>
        <script>
            var editor = new FCKeditor('editor');
            editor.BasePath = 'fckeditor/';
            editor.ReplaceTextarea();
        </script>
        <input type="submit" value="Submit">
    </form>
</body>
</html>