What are the limitations of browser support for the "datetime-local" input type in PHP applications, and how can developers work around them effectively?

The limitation of browser support for the "datetime-local" input type in PHP applications is that some older browsers do not fully support this input type, leading to compatibility issues. To work around this effectively, developers can use a combination of HTML5 input types and PHP date functions to ensure cross-browser compatibility.

<input type="datetime-local" name="datetime" id="datetime">
```

```php
$datetime = date('Y-m-d\TH:i', strtotime($_POST['datetime']));