What are the best practices for handling text input in PHP to avoid error messages like "You have not entered any text"?

When handling text input in PHP, it is important to check if the input is empty before processing it to avoid error messages like "You have not entered any text". One way to handle this is by using the `empty()` function to check if the input is not empty before proceeding with further processing.

// Check if text input is not empty
if (!empty($_POST['text_input'])) {
    // Process the text input
    $text = $_POST['text_input'];
    // Further processing code here
} else {
    // Handle the case where no text input is provided
    echo "You have not entered any text";
}