system uptime

system uptime using php_w32api.dll functions

<?php
$api = new win32;
$api->registerfunction("bool QueryPerformanceCounter (float &lpPerformanceCount) From kernel32.dll");
$api->registerfunction("bool QueryPerformanceFrequency (float &lpPerformanceFrequency) From kernel32.dll");
$api->QueryPerformanceCounter($a);
$api->QueryPerformanceFrequency($b);
$c = $a/$b;
$days = floor($c / 86400);
echo gmstrftime("System uptime is $days Days, %H Hr, %M Min, %S Sec<br>", $c);
?>