getting process id in php

[shoonya]

i am using windows XP

and using
popen("start notepad","r");

to start a note pad
now how can i get the process id of this notepad

shoonya

[Atli]

Check out the proc_get_status() function.
It should get you what you need.

[shoonya]

thanks a lot atil

but when I am using popen to open the note pad it's giving error
[PHP]
PHP Warning: proc_get_status(): supplied resource is not a valid process resource in C:\Program Files\Apache Group\Apache2\htdocs\quedge3\index\test.php on line 46[/PHP]

i think it's looking for a process that has been opened by proc_open but i am not able to get the syntax of proc_open

so help me out
i am stuck here for last 2 days :(

shoonya

[Atli]

I managed to get this working using the 'ipconfig' command, didn't manage to get a notepad window. Don't really undestand why you'd want that anyways.

But anyhow.. this is my code:

<?php
error_reporting(E_ALL);
 
$descriptorspec = array(
   0 => array("pipe", "r"),
   1 => array("pipe", "w"), 
   2 => array("pipe", "r")
);
 
$process = proc_open('ipconfig', $descriptorspec, $pipes);
 
if (is_resource($process)) {
 
    // Get the proccess info
    echo "Proccess information:<pre>";
    $var = proc_get_status($process);
    print_r($var);
    echo "</pre>";
 
    // Print stream from proccess
    echo "Process output:<pre>";
    echo stream_get_contents($pipes[1]);
    echo "</pre>";
    fclose($pipes[1]);
 
    // It is important that you close any pipes before calling
    // proc_close in order to avoid a deadlock
    $return_value = proc_close($process);
 
    // Print return value (0 if success)
    echo "Process returned:<pre>";
    echo $return_value ."\r\n";
    echo "</pre>";
}
else
{
  echo "Process failed to open";
}
?>
 

This is based on an example found at php.net/proc_open

[shoonya]

ooops
you have just pasted the example from php.net

I was not getting the concept of pipes and streams
so any good tutorial or link will work for me

shoonya