<?php
/*
Taken from: http://php.net/manual/en/function.exec.php
No source attribution given except Peec.  No source code license provided, as it was posted publically
with no listed restrictions on use, assume this script is in the public domain.

No warranty is provided.
*/

/* An easy way to keep in track of external processes.
 * Ever wanted to execute a process in php, but you still wanted to have somewhat controll of the process ? Well.. This is a way of doing it.
 * @compability: Linux only. (Windows does not work).
 * @author: Peec
 */
class Process{
    private $pid;
    private $command;

    public function __construct($cl=false){
        if ($cl != false){
            $this->command = $cl;
            $this->runCom();
        }
    }
    private function runCom(){
		$command = 'nohup '.$this->command.' 2>&1 < /dev/null & echo $!';
		exec($command ,$op);
        $this->pid = (int)$op[0];
    }

    public function setPid($pid){
        $this->pid = $pid;
    }

    public function getPid(){
        return $this->pid;
    }

    public function status(){
        $command = 'ps -p '.$this->pid;
        exec($command,$op);
        if (!isset($op[1]))return false;
        else return true;
    }

    public function start(){
        if ($this->command != '')$this->runCom();
        else return true;
    }

    public function stop(){
        $command = 'kill '.$this->pid;
        exec($command);
        if ($this->status() == false)return true;
        else return false;
    }
}
?>
