getmyinode
<?php
/*
mixed getpidinfo(mixed pid [, string system_ps_command_options])
this function gets PID-info from system ps command and return it in useful assoc-array,
or return false and trigger warning if PID doesn't exists
$pidifo=getpidinfo(12345);
print_r($pidifo);
Array
(
[USER] => user
[PID] => 12345
[%CPU] => 0.0
[%MEM] => 0.0
[VSZ] => 1720
[RSS] => 8
[TT] => ??
[STAT] => Is
[STARTED] => 6:00PM
[TIME] => 0:00.01
[COMMAND] => php someproces.php > logfile
)
*/
//////////////////////////////////////////////
function getpidinfo($pid, $ps_opt="aux"){
$ps=shell_exec("ps ".$ps_opt."p ".$pid);
$ps=explode("\n", $ps);
if(count($ps)<2){
trigger_error("PID ".$pid." doesn't exists", E_USER_WARNING);
return false;
}
foreach($ps as $key=>$val){
$ps[$key]=explode(" ", ereg_replace(" +", " ", trim($ps[$key])));
}
foreach($ps[0] as $key=>$val){
$pidinfo[$val] = $ps[1][$key];
unset($ps[1][$key]);
}
if(is_array($ps[1])){
$pidinfo[$val].=" ".implode(" ", $ps[1]);
}
return $pidinfo;
}
?>
getmypid
(PHP 4, PHP 5)
getmypid — Gets PHP's process ID
Description
int getmypid
( void
)
Gets the current PHP process ID.
Return Values
Returns the current PHP process ID, or FALSE on error.
Notes
Warning
Process IDs are not unique, thus they are a weak entropy source. We recommend against relying on pids in security-dependent contexts.
add a note
User Contributed Notesgetmypid
kroczu at interia dot pl
19-Dec-2005 06:59
19-Dec-2005 06:59
Pure-PHP
21-Mar-2005 04:26
21-Mar-2005 04:26
You can use this function also to avoid more than one instance of your app.
You can also use this class.
http://www.pure-php.de/node/20
Usage:
<?php
inlude("ProcessHandler.class.php");
if(ProcessHandler::isActive()){
die("Already running!\n";);
}else{
ProcessHandler::activate();
//run my app
}
?>
brooke at jump dot net
24-Oct-2003 07:49
24-Oct-2003 07:49
One good use for this is deciding on a concurrency-safe temporary file or directory name. You can be assured that no two processes on the same server have the same PID, so this is enough to avoid collisions. For example:
<?php
$tmpfile = "/tmp/foo_".getmypid();
// Use $tmpfile...
// Use $tmpfile...
// Use $tmpfile...
unlink ($tmpfile);
?>
If you are sharing /tmp over the network (which is odd....) then you can, of course, mix in the PHP server's IP address.