Uptime via PHP. Saved from my blog since I have now replaced this with a much more efficient and secure method (bash > html outoput).

k0nsl-php-uptime.php

<?php
        function linuxUptime() {
                $ut = strtok(exec("cat /proc/uptime" ), ".");
                $days = sprintf("%2d", ($ut/(3600*24)));
                $hours = sprintf("%2d", ( ($ut % (3600*24)) / 3600));
                $min = sprintf("%2d", ($ut % (3600*24) % 3600)/60);
                $sec = sprintf("%2d", ($ut % (3600*24) % 3600)%60);
                return array($days, $hours, $min, $sec);
        }
 
        $ut = linuxUptime();
 
        echo "<small>\nUptime: $ut[0] days, $ut[1] hours and $ut[2] minutes</small>\n";
?>