What are the advantages and disadvantages of using different input types like "datetime" or "datetime-local" in PHP forms for time-related data entry?

When working with time-related data entry in PHP forms, using different input types like "datetime" or "datetime-local" can offer advantages such as built-in validation and user-friendly interfaces. However, the main disadvantage is that these input types may not be supported by all browsers, leading to inconsistent user experiences.

<form action="submit.php" method="post">
  <label for="datetime">Select a date and time:</label>
  <input type="datetime-local" id="datetime" name="datetime">
  <input type="submit" value="Submit">
</form>