The most simple timing tool for PHP

ExampleTimer.php

<?php

require_once( 'Timer.php' );

Timer::start();
// do something
echo "Time elapsed: " . Timer::end() . "\n";

Timer.php

<?php 
class Timer
{
    static private $_start = null;

    static public function start()
    {
        self::$_start = microtime( true );
    }
    
    static public function end()
    {
        return self::$_time = microtime( true ) - self::$_start;
    }
}