How can PHP developers ensure that JavaScript functions can access and manipulate array-based form elements effectively?

PHP developers can ensure that JavaScript functions can access and manipulate array-based form elements effectively by properly formatting the HTML form elements with array notation in the name attribute. This allows PHP to parse the form data into an array, making it easier for JavaScript to target specific elements using their array keys. By using this naming convention, PHP developers can ensure seamless communication between PHP and JavaScript when working with array-based form elements.

<form action="process_form.php" method="post">
    <input type="text" name="user[name]" value="John Doe">
    <input type="text" name="user[email]" value="johndoe@example.com">
</form>