What are the potential pitfalls of using ob_get_contents() and ob_end_flush() to improve PHP page speed?

Using ob_get_contents() and ob_end_flush() can improve PHP page speed by buffering output and sending it all at once. However, if not used properly, it can lead to unexpected output or errors. To avoid pitfalls, make sure to properly manage output buffering and error handling.

ob_start();

// Your PHP code here

$content = ob_get_contents();
ob_end_clean();

echo $content;