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ATLChris
ATLChris

Reputation: 3296

PHP Get Page Load Stats - How to measure php script execution / load time

What I have in the header:

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

What I have in the footer:

$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.';

Output: Page generated in 1292008977.54 seconds.

Can someone please help me figure out why the result is not right?? I am using PHP5.

Upvotes: 9

Views: 28022

Answers (9)

Ron
Ron

Reputation: 6621

One liner for the footer, which returns seconds as float:

echo number_format(microtime(true) - $_SERVER["REQUEST_TIME_FLOAT"],4);

You do not need to put anything at the start of your script, as $_SERVER["REQUEST_TIME_FLOAT"] takes care to capture this time when the PHP script starts... Then you only need to calculate at the very end of the PHP how much time has passed.

Upvotes: 2

SeriesBlue
SeriesBlue

Reputation: 21

Instead of using microtime in every single page, what i would do is to insert microtime into $_REQUEST and then subtract that time from the current time inside a function and set that function to be called when the script execution is terminated using:

register_shutdown_function ( 'Your_function_name' );

I think that it is useful to use a global script which will be included at the beginning of every script / class throughout the application, it helps me in handling errors, managing sessions, etc...

Adding microtime to $_REQUEST would be the first line in that script and you can include your terminating function there too.

Upvotes: 0

Jeremy Muckel
Jeremy Muckel

Reputation: 73

The issue is with variable scope. You set your $start variable in the header, but in footer, this variable will be empty. So $total_time would just be current time - 0, giving you the current time.

A solution is to use php's GLOBALS. In the header:

$GLOBALS['time_start'] = microtime(true);

And in the footer:

$total_time = round(($finish - $GLOBALS['time_start']), 4);

Upvotes: 0

Sebastian
Sebastian

Reputation: 1

Put this in your Header

<?php

$starttime = explode(' ', microtime());
$starttime = $starttime[1] + $starttime[0];

?>

and this in your footer

<html><center>Page generated in <?php $load = microtime();print (number_format($load,2));?> seconds. <?php
$loadtime = explode(' ', microtime()); $loadtime = $loadtime[0]+$loadtime[1]-$starttime; echo 'Peak memory usage: ',round(memory_get_peak_usage()/1048576, 2), 'MB';
?></center></html>

this will tell you how long it took your sites page to generate and how much Memory was used to load the page

Upvotes: 0

John Gardner
John Gardner

Reputation: 25168

microtime() returns the current Unix timestamp with microseconds. i don't see any math there that does the conversion from microseconds to seconds.

microtime(true) returns the time as a float in seconds

Upvotes: 6

GhostInTheSecureShell
GhostInTheSecureShell

Reputation: 1010

Seeing how this is the first result in Google I thought I'd share my solution to this problem. Put this at the top of your page:

$startScriptTime=microtime(TRUE);

And then put this code at the bottom of your page:

$endScriptTime=microtime(TRUE);
$totalScriptTime=$endScriptTime-$startScriptTime;
echo "\n\r".'<!-- Load time: '.number_format($totalScriptTime, 4).' seconds -->';

When you view source of a page you can see the load time in a comment on the last line of your HTML.

Upvotes: 8

Mizhar
Mizhar

Reputation: 11

$page_loadtime_in_millisec = ($page_loadtime / 1000);
echo '<pre>Page Infor:
Page Load Time : ' . $page_loadtime.' <b>Microseconds</b><br/>
Page Load Time : ' . $page_loadtime_in_millisec.' <b>Milliseconds</b><br/>
Page Load Time : ' . number_format(($page_loadtime_in_millisec/1000),18) . ' <b>Seconds</b></pre>';

Upvotes: 1

Istv&#225;n Ujj-M&#233;sz&#225;ros
Istv&#225;n Ujj-M&#233;sz&#225;ros

Reputation: 3247

You can use this simple function to avoid the variable scope issue:

<?php

function timer()
{
    static $start;

    if (is_null($start))
    {
        $start = microtime(true);
    }
    else
    {
        $diff = round((microtime(true) - $start), 4);
        $start = null;
        return $diff;
    }
}

timer();

echo 'Page generated in ' . timer() . ' seconds.';

Upvotes: 6

profitphp
profitphp

Reputation: 8354

I like to use something like this. Makes it easy to time multiple code blocks without juggling variable names and such. sessions have to be enabled.

function code_timer ($name) {

    $mtime = explode(' ',microtime());
    $time = $mtime[1] + $mtime[0];

    //determine if we're starting the timer or ending it
    if ($_SESSION["timer-$name"]) {
      $stime=$_SESSION["timer-$name"];
      unset($_SESSION["timer-$name"]);
      return ($time - $stime);
    } else {
      $_SESSION["timer-$name"]=$time;
      return(true);  
    }
}

usage: 

code_timer ('a');
//do stuff
echo "page generated in " . code_timer('a');

Upvotes: 1

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