<?php
 
class Timer {
 
    static $time=array();
 
    public function set($n='0') {
 
        list($msec, $sec) = explode(chr(32), microtime());
 
        self::$time[$n]=$msec+$sec;
 
    }
 
    public function get($n='0') {
 
        list($msec, $sec) = explode(chr(32), microtime());
 
        $now=$msec+$sec;
 
        return round($now-self::$time[$n], 12)."<br/>";
 
    }
 
}
 
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