Microtime Returning Incorrect Results

[onggie]

Hi am just learning PHP and I'm building a website for my work that does some monitoring. I seem to be having a strange issue when using the microtime function in PHP. On my index.php I have the following

$.ajax({
url:'loadtime.php',
datatype:"application/json",
type:'get',
data: "host=http://www.mywebsite.com",
success:function(data){
document.getElementById('loadtime_com').innerHTML = data;
},
error:function(){
// code for error
}
});

On loadtime.php

$host = $_GET['host'];

$time = microtime( TRUE );
file_get_contents( $host );
$time = microtime( TRUE ) - $time;
echo $time;

When going to my index.php it shows a time of anything under 2.00 seconds (which is wrong). I then created another PHP file called loadtime2.php and changed the code to

$host = "http://www.mywebsite.com";

$time = microtime( TRUE );
file_get_contents( $host );
$time = microtime( TRUE ) - $time;
echo $time;

And then test the script by going to mywebsite.com/loadtime2.php and this gives me times over 5.00 seconds. I can't work out what is causing this discrepancy, it's like microtime is giving me the time to retrieve loadtime.php from index.php instead of the time to get the website contents.

 

[mac_gyver]

what php version? because microtime(true) only produces values that can be directly subtracted in php5.0 or above.

[onggie]

what php version? because microtime(true) only produces values that can be directly subtracted in php5.0 or above.

Thanks for the reply. I'm on a vanilla CentOS 6 server. So by default it's running 5.3.3.

 

Edit: Spelling

Edited October 24, 2013 by onggie

[AdRock]

Don't know if this helps but this is what I used years ago

 

function getmicrotime() {
    list($usec, $sec) = explode(" ",microtime());
    return ((float)$usec + (float)$sec);
}

$start_time = getmicrotime(); 

//  do whatever like a database query

$end_time = getmicrotime();

echo '<span class="bold">'.substr($end_time-$start_time,0,5).'</span> seconds';

[onggie]

 

Don't know if this helps but this is what I used years ago

 

function getmicrotime() {
    list($usec, $sec) = explode(" ",microtime());
    return ((float)$usec + (float)$sec);
}

$start_time = getmicrotime(); 

//  do whatever like a database query

$end_time = getmicrotime();

echo '<span class="bold">'.substr($end_time-$start_time,0,5).'</span> seconds';

 

 

Thanks, I will give this a try.  I can't tell if it's working at the moment as all the services are running correctly.  But hopefully I can see in the next couple of days.

[onggie]

 

Don't know if this helps but this is what I used years ago

 

function getmicrotime() {
    list($usec, $sec) = explode(" ",microtime());
    return ((float)$usec + (float)$sec);
}

$start_time = getmicrotime(); 

//  do whatever like a database query

$end_time = getmicrotime();

echo '<span class="bold">'.substr($end_time-$start_time,0,5).'</span> seconds';

 

Unfortunately this doesn't seem to work, on my loadtime2.php script which just has the timing is showing between 1.5 - 2.5 seconds and the index.php is showing 0.86 seconds.

Any others have an idea what could be the solution to this problem.  It is mind boggling.