How can the placeholder attribute be utilized as an alternative to the value attribute in PHP form development?

When developing forms in PHP, the placeholder attribute can be used as an alternative to the value attribute for input fields. The placeholder attribute provides a hint or example of the expected input for the user, without actually setting a default value. This can be useful for providing guidance to users without pre-filling the form fields.

<form method="post" action="submit.php">
  <input type="text" name="username" placeholder="Enter your username" required>
  <input type="password" name="password" placeholder="Enter your password" required>
  <button type="submit">Submit</button>
</form>