웹 페이지 로딩 시간을 구해보자. 웹 페이지 속도 측정

Measuring PHP page load time

You probably wonder how much time is needed for your PHP page to load. It can be crucial for your web server if your php scripts load slow and take most of the CPU and RAM resources. It is also a good idea to measure  parts of your PHP code which can cause delays such as for/while cycles, writing/reading to/from files or MySQL database.
Using microtime() PHP function you will know exactly how much time is needed for your PHP code to be executed. Follow the steps below to put the PHP code on your web page:
Put the following code at the very top of your PHP page (if you measure the time needed for particular part of the code put this right before that PHP code part)

<?php
$time = microtime();
$time = explode(' ', $time);
$time = $time[1] + $time[0];
$start = $time;
?>

The following code has to be put at the very end of the web page (or the end of the PHP code part)

$time = microtime();
$time = explode(' ', $time);
$time = $time[1] + $time[0];
$finish = $time;
$total_time = round(($finish - $start), 4);
echo 'Page generated in '.$total_time.' seconds.'."\n";
?>

Now, when you access your web page you will know the time needed for it to execute. This is an example output of what you are going to see:
Page generated in 0.0031 seconds.


좀더 편리하게 사용하기 위해서 함수 형태로 만들어 보았다.


<?php

function current_time()
{
        $time = microtime();
        $time = explode(' ', $time);
        $time = $time[1] + $time[0];
        return $time;
}
function get_elapsed_time($start, $end)
{
$total_time = round(($end - $start), 4);
        return $total_time;
}
?>