Examples
Output Control Functions
Examples
PHP Manual

## Basic usage

Example #1 Output Control example

`<?php
ob_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. (You can not normally send headers to the browser after data has already been sent.)