How can the PHP manual be effectively used to find solutions to coding issues related to output and redirection?

To redirect output in PHP, you can use functions like ob_start() to buffer the output, ob_get_clean() to retrieve the buffered output and redirect it, and header() to send HTTP headers for redirection.

ob_start();
// Your code that generates output
$output = ob_get_clean();
header("Location: new_page.php");
exit();