mysql sleep connections

1SELECT SLEEP(5);    -- 5 seconds
2DO SLEEP(5);		-- same, output available

1<?php
2$result = mysql_query("SHOW processlist");
3while ($myrow = mysql_fetch_assoc($result)) {
4if ($myrow['Command'] == "Sleep") {
5mysql_query("KILL {$myrow['Id']}");}
6}
7?>
8