Output buffering

Describe how to use output buffering for:

  • Chat
  • Server information
  • Progress information on longer tasks - such as picture thumbnailing.

clock-example.php

<?php
    set_time_limit(0); // we don't want script to expire

    // Tell parser to stop buffering and flush on our command
    ob_end_flush();

    // Keep running till user stops us
    while (1) {
        // Print clock
        print date("j/n - Y - G:i:s")."<br>\n";

        // Send our current buffer to the user
        flush();

        // Wait one second before continuing
        sleep(1);
    }
?>
 See script in action >>