What are some best practices for handling output in PHP scripts to avoid unexpected behavior like empty pages?

When handling output in PHP scripts, it's important to ensure that there are no errors or issues that could result in empty pages. One way to prevent this is by using proper error handling techniques and checking for errors before outputting any content.

<?php
// Start output buffering
ob_start();

// Your PHP code here

// Check for errors before outputting content
if (!empty($output)) {
    echo $output;
} else {
    echo "Error: No output available.";
}

// Flush output buffer
ob_end_flush();
?>