Php/docs/outcontrol.examples.basic
From Get docs
Basic usage
Example #1 Output Control example
<?phpob_start();echo "Hello\n";setcookie("cookiename", "cookiedata");ob_end_flush();?>
In the above example, the output from echo would be stored in the output buffer until ob_end_flush() was called. In the mean time, the call to setcookie() successfully stored a cookie without causing an error. (Headers cannot normally be sent to the browser after data has already been sent.)
