<?php
/**
 * PHP-WMI Library
 * Version 0.0.2
 * 
 * Copyright (c) 2010 Ross Fawcett
 * 
 * Code based on CactiWMI project also by Ross Fawcett
 */
 
class WMI {
	function __construct() {
		$this->namespace = escapeshellarg('root\CIMV2');
		$this->host = null;
//		$this->class = 'Win32_ComputerSystem';
//		$this->attributes = array('*');
		$this->credential = '/etc/cacti/cactiwmi.pw';
		$this->filterkey = null;
		$this->filterval = null;
		$this->wmic = '/usr/local/bin/wmic';
	}

	function setFilter($filterkey, $filterval) {
		$this->filterkey = $filterkey;
		$this->filterval = $filterval;
	}

	function execQuery($class, $attributes) {
		// build columns we want
		foreach ($attributes as $attr) {
			$columns .= $attr.',';
		};

		// strip off the last , character as we don't want it
		$columns = substr($columns,0,-1);

		$wmiquery = 'SELECT '.$columns.' FROM '.$class; // basic query built

		if (isset($this->filterkey)) {
			$wmiquery = $wmiquery.' WHERE '.$this->filterkey.'='.escapeshellarg($this->filterval); // if the query has a filter argument add it in
		};

		$wmiquery = '"'.$wmiquery.'"'; // encapsulate the query in " "

		$wmiexec = $this->wmic.' --namespace='.$this->namespace.' --authentication-file='.$this->credential.' //'.$this->host.' '.$wmiquery. ' 2>/dev/null'; // setup the query to be run and hide error messages

//		echo $wmiexec;

		exec($wmiexec,$wmiout,$execstatus); // execute the query and store output in $wmiout and return code in $execstatus

		$wmi_count = count($wmiout); // count the number of lines returned from wmic, saves recouting later

		if ($wmi_count > 0) {
			$names = explode('|',$wmiout[1]); // build the names list to dymanically output it
			$out = array();
			for($i=2;$i<$wmi_count;$i++) { // dynamically manage the key:value pairs
				$data = explode('|',$wmiout[$i]);
				$j=0;
				foreach($data as $item) { // build the data part of the array
					$tmp[$names[$j++]] = trim($item);
				};
				// and add the data to the final output array
				$out[] = $tmp;
			};
		};

		return $out;
	}


}

?>