memory_get

add a note User Contributed Notes

e dot a dot schultz at gmail dot com
09-Apr-2006 07:41


This is a function that should work for both Windows XP/2003 and most distrabutions of UNIX and Mac OS X. 



<?php

if( !function_exists('memory_get_usage') )

{

    function memory_get_usage()

    {

        //If its Windows

        //Tested on Win XP Pro SP2. Should work on Win 2003 Server too

        //Doesn't work for 2000

        //If you need it to work for 2000 look at http://us2.php.net/manual/en/function.memory-get-usage.php#54642

        if ( substr(PHP_OS,0,3) == 'WIN') 

        {

               if ( substr( PHP_OS, 0, 3 ) == 'WIN' ):

               $output = array();

               exec( 'tasklist /FI "PID eq ' . getmypid() . '" /FO LIST', $output );

        

               return preg_replace( '/[\D]/', '', $output[5] ) * 1024;            

        }else

        {

            //We now assume the OS is UNIX

            //Tested on Mac OS X 10.4.6 and Linux Red Hat Enterprise 4

            //This should work on most UNIX systems

            $pid = getmypid();

            exec("ps -eo%mem,rss,pid | grep $pid", $output);

            $output = explode("  ", $output[0]);

            //rss is given in 1024 byte units

            return $output[1] * 1024;

        }

    }

}

?>

xolox at home dot nl
03-Apr-2006 09:02


<?php



// Original from http://php.net/memory_get_usage by websjwans at hotmail dot com. Thanks alot!

if ( ! function_exists( 'memory_get_usage' ) ):

    // Only define function if it doesn't exist

    function memory_get_usage()

    {

        // If we are running on Windows

        if ( substr( PHP_OS, 0, 3 ) == 'WIN' ):

            $output = array();

            // Should check whether tasklist is available, but I'm lazy

            exec( 'tasklist /FI "PID eq ' . getmypid() . '" /FO LIST', $output );

            // Filter non-numeric characters from output. Why not use substr & strpos?

            // I'm running Windows XP Pro Dutch, and it's output does not match the

            // English variant, as will all other translations. This is a more generic

            // approach, and has a better chance of actually working

            return preg_replace( '/[^0-9]/', '', $output[5] ) * 1024;

            // Tasklist outputs memory usage in kilobytes, memory_get_usage in bytes.

            // So we multiply by 1024 and in the process convert from string to integer.

        else:

            return false;

        endif;

    }

endif;



?>



Works for me. Functionality should match memory_get_usage(), albeit slower (exec & regex). Have fun!



- Peter Odding

John Ring
22-Mar-2006 03:54


Oops, that was a question.



I'll change it to a note simply:



Note: This is NOT enabled at all in the Win32 builds.



Best regards

grey - greywyvern - com
18-Aug-2005 03:37


If nothing else in the user notes below works for you, you can get a very (VERY) rough estimate of PHP memory usage by outputting the $GLOBALS array, stripping it of indentation whitespace, and counting the characters in the resulting string.  This method has a very high overhead (to be expected), but works on all operating systems, regardless of whether or not they have the --enable-memory-limit config option set.  I find that the syntax overhead of the print_r() statement roughly accounts for the PHP runtime base memory usage.



The code below is set up to work on all arrays, not just the $GLOBALS array.  Keep in mind that outside data referenced by resource IDs, such as database results and open file data, is not included in this total.



<?php



function array_size($arr) {

  ob_start();

  print_r($arr);

  $mem = ob_get_contents();

  ob_end_clean();

  $mem = preg_replace("/\n +/", "", $mem);

  $mem = strlen($mem);

  return $mem;

}



$memEstimate = array_size($GLOBALS);



?>



Use only if being off to either side by at least 20% is acceptible for your purposes.

vesa dot kivisto at nepton dot fi
14-Jul-2005 09:02


I was unable to get the previous examples working properly and created code which works at least for me. Enjoy!



// Please note that you'll need the pslist.exe utility from http://www.sysinternals.com/Utilities/PsTools.html

// This is because win/2000 itself does not provide a task list utility.

//

function getMemoryUsage() {



 // try to use PHP build in function

 if( function_exists('memory_get_usage') ) {

  return memory_get_usage();

 }



 // Try to get Windows memory usage via pslist command

 if ( substr(PHP_OS,0,3) == 'WIN') {

  

  $resultRow = 8;

  $resultRowItemStartPosition = 34;

  $resultRowItemLength = 8;

  

  $output = array();

  exec('pslist -m ' . getmypid() , $output);

    

  return trim(substr($output[$resultRow], $resultRowItemStartPosition, $resultRowItemLength)) . ' KB';

  

 }



 

 // No memory functionality available at all

 return '<b style="color: red;">no value</b>';

  

}

guenter_doege at web dot de
11-Jul-2005 02:28


The Win XP / 2003 workaround script will also work with windows 2000 with a few slight modifications.



Please note that you'll need the pslist.exe utility from http://www.sysinternals.com/Utilities/PsTools.html because win/2000 itself does not provide a task list utility.



<?php



function getMemUsage()

{

     

       if (function_exists('memory_get_usage'))

       {

           return memory_get_usage();

       }

       else if ( substr(PHP_OS,0,3) == 'WIN')

       {

           // Windows 2000 workaround



           $output = array(); 

           exec('pslist ' . getmypid() , $output); 

           return trim(substr($output[8],38,10));

       }

       else

       {

           return '<b style="color: red;">no value</b>';

       }

}

?>

MagicalTux at FF dot st
25-May-2005 03:08


When you need to get the OS, do not use $_SERVER['OS'] or $_ENV['OS'], better use PHP_OS constant !

<?php

if (substr(PHP_OS,0,3)=='WIN') {

  // [...]

}

?>



You also have other values such as CYGWIN_NT-5.0, Linux, ... this is the best way to get system's os (anyone on linux can do an "export OS=windows")

webNOSPAMsjwans at hotmail dot com
01-Dec-2004 11:09


A quick and dirty Windows XP / 2003 wordaround:



<?php 



function getMemUsage()

{

        

        if (function_exists('memory_get_usage'))

        {

            return memory_get_usage();

        }

        else if ( strpos( strtolower($_SERVER["OS"]), 'windows') !== false)

        {

            // Windows workaround

            $output = array();

            

            exec('tasklist /FI "PID eq ' . getmypid() . '" /FO LIST', $output);            

            return substr($output[5], strpos($output[5], ':') + 1);

        }

        else

        {

            return '<b style="color: red;">no value</b>';

        }

}



?>

randolphothegreat at yahoo dot com
30-Nov-2004 05:37


I'd just like to point out that although sandeepc at myrealbox dot com's idea for displaying the current memory usage is a good one, it's perhaps a bad idea to pipe the entire process list through grep. A better performing method would be to select only the process we're interested in:



<?

$pid = getmypid();

error_log('MEMORY USAGE (% KB PID ): ' . `ps --pid $pid --no-headers -o%mem,rss,pid`);

?>



True, it's not much of a performance boost, but every bit helps.

ad-rotator.com
15-May-2004 01:31


The method sandeepc at myrealbox dot com posted yields larger memory usage, my guess is that it includes all the PHP interpreter/internal code and not just the script being run.



1) Use ps command

MEMORY USAGE (% KB PID ):  0.8 12588 25087 -> about 12MB

2) Use memory_get_usage() 

int(6041952) -> about 6MB

sandeepc at myrealbox dot com
12-Nov-2003 01:15


To get this in pre 4.2.3 do a (works on unix like systems only):



$my_pid = getmypid();

error_log("MEMORY USAGE (% KB PID ): ".`ps -eo%mem,rss,pid | grep $my_pid`);



found this tip somewhere in bugs.php.net!

add a note

memory_get_usage

Description