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PHP System Process List: Retrieve the processes running on the system

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Version License PHP version Categories
process-list 1.0.0BSD License5.5PHP 5, System information, Unix, Windows
Description Author

This class can retrieve the processes running on the system.

It can perform queries on the current OS to retrieve the list of processes independently of the OS.

The class objects can be iterated like an array, so you can get each process id, command name and parameters, CPU time, start time, title and tty, and children processes.

The process list can be retrieved again using the Refresh function.

It uses WMI queries on Windows and the POSIX call on Linux and Unix like systems.

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Processes are programs running on the current computer operating system.

Different systems manage and access the data of each process in different ways.

This class provides a platform independent solution to retrieve the list of processes and their details running either on Windows or Linux and other Unix-like systems.

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Details

INTRODUCTION

The ProcessList class provides a platform-independent way to retrieve the list of processes running on your systems. It works both on the Windows and Unix platforms.

OVERVIEW

To retrieve the list of processes currently running on your system, simply use the following :

require ( 'ProcessList.phpclass' ) ;

$ps 	=  new ProcessList ( ) ;

The $ps variable can now be accessed as an array to retrieve process information, which is simply an object of class Process :

foreach  ( $ps  as  $process )
	echo ( "PID : {$process -> ProcessId}, COMMAND : {$this -> Command}" ) ;

Whether you are running on Windows or Unix, the properties exposed by the Process objects remain the same (see the Reference section).

DEPENDENCIES

For Windows platforms, you will need the following package :

http://www.phpclasses.org/package/10001-PHP-Provides-access-to-Windows-WMI.html

A copy of the source code is provided here for your convenience, but it may not be the latest release...

Reference

ProcessList class

The ProcessList class is a container class that allows you to retrieve information about individual processes. It implements the ArrayAccess and Iterator interfaces, so that you can loop through each process currently running on your system.

Each element of a ProcessList array is an object of class Process.

Constructor

public function  __construct  ( $load = true ) ;

Creates a process list object. If the $load parameter is true, the process list will be retrieved ; otherwise, you will need to call the Refresh() method later before looping through the list of available processes.

GetProcess

public function  GetProcess ( $id ) ;

Searches for a process having the specified $id.

Returns an object of class Process if found, or false otherwise.

GetProcessByName

public function  GetProcessByName ( $name ) ;

Searches for a process having the specified name. The name is given by the Command property of the Process object.

GetChildren

public function  GetChildren ( $id ) ;

Returns the children of the specified process, or an empty array if $id does not specify a valid process id.

Refresh

public function  Refresh ( ) ;

Refreshes the current process list. This function can be called as many times as desired on the same ProcessList object.

Process class

The Process class does not contain methods, but simply expose properties that contain information about a process.

Argv property

Contains the command-line arguments of the process. As for C (and PHP) programs, Argv[0] represents the command path.

Command

Command name, without its leading path.

CommandLine

Full command line, including arguments.

CpuTime

CPU time consumed by the process, in the form "hh:mm:ss".

ParentProcessId

Dd of the parent process for this process.

ProcessId

Process id of the current process.

StartTime

Process start time, in the form "yyyy-mm-dd hh:mm:ss".

Title

Process title. On Windows systems, it will be the title of the process. Since there is no notion of process title on Unix systems, it will be set to the value of the Command property.

Tty

Attached tty. This information is useful mainly for Unix systems.

User property

User name running the process. On Unix systems, this can be either a user name or a user id.

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