Location: PHPKode > scripts > Advanced Graphing Class > advanced-graphing-class/graph.oo.php
<?php
// Code updates and additional features are released frequently, the most updated version can always be found at: http://www.zackbloom.org

// Their are many examples of how to do almost anything you could ever want to do (using this program, can't help you win the lottery) in the readme file.
// The example page can be a big help for those who lack the attention span to read the readme, all code will work on most setups verbatim
// The code is not that readable so I would stick to the readme.
// Email me at: hide@address.com with any comments, questions, BUGS!!! or just to say hi.
// If you see an something I screwed up on please email me about it.
// Please send any bug reports with a print_r of the graph object if possible.
// Works with PHP5 with GD and TTF support.
// Developed by Zack Bloom
// Licence
// You can do what ever you want with the code, copy all or part, impress girlfriends with your l33t programming skillz, say you wrote it, whatever.
// But I must say it is much more gratifing to write the code yourself (unless it actually takes effort like the AA lines or arrow heads that I stole functions for, then steal away)
// You don't even have to give me credit, just send me a link to any thing cool you make, hide@address.com
// If you develop any for-profit applications, the only requirement is that I get a free account or copy of the program.

if(substr(PHP_VERSION,0,strpos(PHP_VERSION,'.'))<5)
	trigger_error('The Advanced Graphing Class can only be run on PHP5 or above, you can download PHP5 at <a href="http://www.php.net">php.net</a>',E_USER_ERROR);

error_reporting(E_ALL ^ E_NOTICE);

class graph {
	
	public static $numGraphs;
	
	public $width,$height,$numPoints,$xPts,$yPts,$iVars,$dVars,$ids,$props,$time,$xMax,$yMax,$xMin,$yMin;
	
	private $img,$imgCache,$fileCache,$imgCacheFile,$lines,$errors,$div,$evalmath,$mode;
	
	public function __construct($x_width=400,$x_height=200,$xScale=10,$yScale=6,$mode='image',$div='jg'){
		$this->mode = $mode;
		if($this->mode=='div'){
			if(!file_exists('wz_jsgraphics.js'))
				try {
					file_put_contents(dirname(__FILE__).'wz_jsgraphics.js',file_get_contents('http://www.zackbloom.org/graph/wz_jsgraphics.js'));
				} catch(Exception $e) {
					$this->error('You must download the javascript graphics library, <a href="http://www.zackbloom.org/graph/wz_jsgraphics.js">http://www.zackbloom.org/graph/wz_jsgraphics.js</a> to use this feature.',E_USER_ERROR);
				}
					$this->div = new jgwrap($div,'arial');
		}
		$this->props = array();
		$this->xPts = array();
		$this->yPts = array();
		$this->iVars[0] = array();
		$this->dVars[0] = array();
		$this->errors = array();
		$this->width = $x_width;
		$this->height = $x_height;
		$this->numPoints[0] = 0;
		$this->xMax = 1;
		$this->yMax = 1;
		$this->xMin = 0;
		$this->yMin = 0;
		$this->lines = 1;
		$this->evalmath = new EvalMath;
		$this->setBulkProps("xsclpts:$xScale,ysclpts:$yScale,xsclpts:10,ysclpts:6,xsclmax:1,xsclmin:0,ysclmax:1,ysclmin:0,xSclInc:1,ySclInc:.165,sclline:5,onfreq:.2,actwidth:".($x_width+30).",actheight:".($x_height+30).",xincpts:10,yincpts:6,autoscl:true");
		$this->setProp("color",array(0,0,255,0));
		$this->setProp("backcolor",array(255,255,255));		
		$this->img = imagecreatetruecolor($this->width,$this->height);	
		if(!file_exists('arial.ttf'))
			try {
				file_put_contents(dirname(__FILE__).'/arial.ttf',file_get_contents('http://www.zackbloom.org/graph/arial.ttf'));
			} catch(Exception $e) {
				$this->error('You must download the arial font file from <a href="http://www.zackbloom.org/graph/arial.ttf">http://www.zackbloom.org/graph/arial.ttf</a> or download the full download zip file from <a href="http://www.zackbloom.org">zackbloom.org</a> before using this class. The font must be in the same folder as the class.',E_USER_ERROR);
			}
	}
	
	public function __destruct(){
		if(isset($this->fileCache) && !$this->getProp("keepcache",true))
			unlink($this->fileCache);
		if(isset($this->imgCache) && !$this->getProp("keepcache",true))
			unlink($this->imgCache);
	}
	
	public function setProp($name,$value,$l=-1){
		if($l+1>$this->lines) $this->lines++;
		$this->props[$l][strtolower($this->strim($name))] = $this->strim($value);
	}
	
	public function __set($name,$value){
		$this->setProp($name,$value);
	}
	
	public function storeGraph($file="graphCache.data",$image=false){
		$this->fileCache = $file;
		if($image){
			$this->imgCacheFile = $image;
			ob_start();
			imagepng($this->img);
			unset($this->img);
			$img = ob_get_flush();
			file_put_contents($image,$img);
		}
		file_put_contents($file,serialize($this));
		if($image)
			return array($file,$image);
		else
			return $file;
	}
	
	public function retriveGraph($file="graphCache.data"){
		return unserialize(file_get_contents($file));
	}
	
	public function retriveImage($image){
		$this->img = imagecreatefrompng($image);
	}
	
	public function setBulkProps($str){
		if($str=="") return false;
		if(func_num_args()==1){
			$str = str_replace(array(":red",":green",":blue",":orange",":yellow",":pink",":purple",":teal",":black",":white",":lightgray",":darkgray"),array(":230-60-60",":100-200-100",":60-60-230",":255-160-15",":255-255-0",":255-0-170",":216-0-255",":0-255-255",":0-0-0",":255-255-255",":150-150-150",":80-80-80"),$str);
			foreach(explode(",",$str) as $e){
				$d=explode(":",$e);
				if(strpos($d[0],"|")){
					$g = explode("|",$d[0]);
					$d[0] = $g[1];
					$d[2] = $g[0];
				} else
					$d[2] = -1;
				if(strpos($d[0],"color")!==false)
					$d[1] = explode("-",$d[1]);
				$this->setProp($d[0],$d[1],$d[2]);
			}
		}else{
			$arg = func_get_args();
			foreach($arg as $e){
				if(is_string($e)){
					$e = explode(":",$e);
					if(strpos("|",$e[0])){
						$g = explode("|",$e[0]);
						$e[0] = $e[1];
						$e[2] = $e[0];
					} else
						$e[2] = -1;
				} else
					if(isset($e[2])==false)
						$e[2] = -1;
				$this->setProp($e[0],$e[1],$e[2]);
			}
		}
		return true;
	}
	
	private function strim($a){
		if(is_string($a))
			return trim($a);
		else
			return $a;
	}
	
	public function storePropArr($arr){
		$this->props = $arr;
	}
	
	public function getPropArr(){
		return $this->props;
	}
	
	public function getProp($name,$asu = false,$l=0){
		$name = strtolower($this->strim($name));
		if(isset($this->props[$l][$name]))
			return $this->props[$l][$name];
		else
			if(isset($this->props[-1][$name]))
				return $this->props[-1][$name];
			else {
				if($asu===-9)
					$this->error('The required property '.$name.' was not set');
				elseif($asu===-8)
					$this->error('The property '.$name.' was not found');
				else
					return $this->strim($asu);
			}
		return false;
	}
	
	public function __get($name){
		return $this->getProp($name,-8);
	}
	
	public function __call($name,$args){
		if(count($args)!=2)
			$this->error("Method $name not found.",true);
		return $this->getProp($name,$args[0],$args[1]);
	}
	
	public function setColor($obj,$l,$r,$g=-1,$b=-1,$a=0){
		if(substr($obj,-5)!="color")
			$obj.="color";
		if(is_string($r) && $g==-1 && $b==-1){
			$colors = array("red","green","blue","orange","yellow","pink","purple","teal","black","white","lightgray","darkgray");
			$cid = array(array(230,60,60),array(100,200,100),array(60,60,230),array(255,160,15),array(255,255,0),array(255,0,170),array(216,0,255),array(0,255,255),array(0,0,0),array(255,255,255),array(150,150,150),array(80,80,80));
			$x=array_search(strtolower($r),$colors);
			if($x!==false)
				$this->setColor($obj,$l,$cid[$x][0],$cid[$x][1],$cid[$x][2],0);
			else
				$this->error("Color not found");
		} else
			$this->setProp($obj,array($r,$g,$b,$a),$l);
	}
	
	private function xScale($x){
		if(($this->xMax-$this->xMin)>0)
			return $this->width * (($x-$this->xMin)/($this->xMax-$this->xMin));
		else
			return 0;
	}
	
	private function yScale($y){
		if((($this->yMax-$this->yMin))>0)
			return $this->height * (($y-$this->yMin)/($this->yMax-$this->yMin));
		else
			return 0;
	}
	public function addPoint($d,$i=-5,$l=0){
		if($l+1>$this->lines){
			$this->lines++;
			$this->numPoints[$l] = 0;
			$this->iVars[$l] = array();
			$this->dVars[$l] = array();
		}
		if(is_array($d)){
			if(count($d)==3)
				return $this->addPoint($d[0],$d[1],$d[2]);
			elseif(count($d)==2 && isset($d[1]))
				return $this->addPoint($d[0],$d[1]);
			elseif(count($d)==2)
				return $this->addPoint($d[0],-5,$d[2]);
			else
				return $this->addPoint($d[0]);
		}
		if($i==-5) $i=(count($this->iVars[$l])>0?max($this->iVars[$l])+1:0);
		$this->iVars[$l][] = $i;
		$this->dVars[$l][] = $d;
		$id = rand(1,10000000);
		$this->ids[$l][] = $id;
		$this->numPoints[$l]++;
		return $id;
	}
	
	public function addBulkPoints($a,$sep=":"){
		if(is_string($a)){
			foreach(explode(",",$a) as $e){
				$e = explode($sep,$e);
				if(strpos($e[0],"|")){
					$d = explode('|',$e[0]);
					$e[0] = $d[1];
					$e[2] = $d[0];
				}else
					$e[2] = 0;
				$ids[] = $this->addPoint($e);
			}
		} elseif(func_num_args()>1) {
			$arg = func_get_args();
			foreach($arg as $e)
				$ids[] = $this->addPoint($e);
		} elseif(is_array($a)){
			foreach($a as $e)
				$ids[] = $this->addPoint($e);
		} else
			return false;
		return $ids;
	}
	
	public function delBulkPoints($a){
		if(is_string($a)){
			foreach(explode(",",$a) as $e)
				$ids[] = $this->delPoint($e);
		} elseif(is_array($a)){
			foreach($a as $e)
				$ids[] = $this->delPoint($e);
		} else {
			$arg = func_get_args();
			foreach($arg as $e)
				$ids[] = $this->delPoint($e);
		}
		return $ids;
	}
	
	private function idSearch($b){
		foreach($this->ids as $k => $v){
			$e = array_search($b,$v);
			if($e!==false)
				return array($e,$k);
		}
		return false;
	}
	
	public function delPoint($id,$k=-1){
		if($k==-1)
			$k = $this->idSearch($id);
		if ($k === false)
			return $k;
		unset($this->dVars[$k[1]][$k[0]],$this->iVars[$k[1]][$k[0]],$this->ids[$k[1]][$k[0]]);
		$this->numPoints[$k[1]]--;
		return true;
	}
	
	public function clearPoints(){
		$this->dVars = array();
		$this->iVars = array();
		$this->ids = array();
		foreach($this->numPoints as $k => $e)
			$this->numPoints[$k]=0;
	}
	
	public function demoData($i=10,$mi=0,$ma=10){
		for($j=0;$j<$i;$j++){
			$this->addPoint(rand($mi,$ma));
		}
	}
	
	private function error($x="Error",$ext=false){
		$log = $this->getProp("logfile",false);
		if($x!==true)
			$this->errors[] = $x;
		else{
			if(!$this->getProp("production",false))
				foreach($this->errors as $k => $x)
					imagestring($this->img,2,10,10+$k*12,$x,imagecolorallocate($this->img,255,0,0));
			if($log){
				$l = fopen($log,'a');
				if($this->errors)
					fwrite($l,"\nSESSION ".date("D M j G:i:s T Y").', '.$_SERVER['REMOTE_ADDR']."\n");
				foreach($this->errors as $k => $x)
					fwrite($l,$x."\n");
				fclose($l);
			}
		}
		if($log && $ext){
			$l = fopen($log,'a');
			fwrite($l,'FATAL ERROR: '.$x."\n".date("D M j G:i:s T Y").', '.$_SERVER['REMOTE_ADDR']."\n\n");
		}
		if(!$this->getProp("production",false)){
			if($ext==true)
				trigger_error($x,E_USER_ERROR);
		} else
			trigger_error("Their was an error, please contact the webmaster",E_USER_ERROR);
	}
	
	public function importMySQL($table,$field,$rcodb=null,$user=null,$pass=null,$server="localhost",$freq=true){
		if(!is_resource($rcodb)){
			$m = mysql_connect($server,$user,$pass);
			if(!$m)
				$this->error("Could not connect to MySQL server.",true);
			$d = mysql_select_db($rcodb,$m);
			if(!$d)
				$this->error("Could not select MySQL database.",true);
			$rcodb = $m;
		}
		$q = mysql_query("SELECT `$field` FROM $table");
		if(!$q)
			$this->error("Error querying MySQL database, check table and field.",true);
		while ($r = mysql_fetch_array($q, MYSQL_NUM))
			$a[] = $r[0]; 
		if($freq==true){
			$s = array_count_values($a);
			foreach($s as $e)
				$this->addPoint($e);
			$this->setProp("key",array_keys($s));
			$this->setProp("showkey",true);
		} else
			$this->addBulkPoints($a);
	}
	
	public function importCSV($file,$format='l,d,i',$dl=0){ //Read the readme
		@$handle = fopen($file,"r");
		if(!$handle){$this->error("Error opening CSV!",E_USER_ERROR);return false;}
		foreach(explode(',',$format) as $k => $s)
			$pos[$s] = $k;
		while (($data[] = fgetcsv($handle, 1000)) !== FALSE){}
		foreach($data as $k => $d){
			if(isset($pos['i']))
				$i = $d[$pos['i']];
			else
				$i = -5;
			if(isset($pos['l']))
				$l = $d[$pos['l']];
			else
				$l = $dl;
			if($d[$pos['d']] && $i)
			$idArr[] = $this->addPoint($d[$pos['d']],$i,$l);
		}
		return $idArr;
	}
	
	public function importXML($file,$ind="i",$dep="d",$block="",$dl=0){ //Read the readme
		if($block!=""){
			$eblock = "</".$block.">";
			$block = "<".$block."( $dl=([0-9])*)?>";
		}
		$str = file_get_contents($file);
		if($str==false){$this->error("Error opening XML File!",E_USER_ERROR);return false;}
		$str = trim($str);
		$arr = array();
		if(preg_match_all("[$block<([$ind|$dep])>([0-9])*</[($ind|$dep)]><([$ind|$dep])>([0-9])*</[($ind|$dep)]>$eblock]",$str,$arr)==0)
			$this->error("No data found in XML file, check format",true);
		$i=($arr[3][0]==$ind?4:6);
		$d=($arr[3][0]==$ind?6:4);
		foreach($arr[$d] as $k => $r)
			$idArr[] = $this->addPoint($arr[$d][$k],$arr[$i][$k],(is_string($dl)?$arr[2][$k]:$dl));
		return $idArr;
	}
	
	public function graphFunction($func,$minX,$maxX,$l=0){
		$inv = $this->getProp('funcinterval',.0625);
		$inv += .005;
		$this->evalmath->evaluate('graph(x)='.str_replace('$x','x',$func));
		for($x=$minX;$x<=$maxX;$x+=$inv)
			$pts[] = $this->addPoint($this->evalmath->evaluate("graph($x)"),$x,$l);
		$this->setProp('sort',false);
		return $pts;
	}
	
	public function evaluate($f){
		return $this->evalmath->evaluate($f);
	}
	
	public function graph(){ //Allows internalGraph to return false if it needs to restart
		do
			$x = $this->internalGraph();
		while ($x==false);
	}
	
	private function cacheImg($img=0){
		if(isset($this->imgCache))
			return $this->imgCache;
		else 
			$this->imgCache = $img;
		return false;
	}
	
	private function multiMax($a){
		$max = -1000000000;
		foreach($a as $e)
			if(max($e)>$max)
				$max = max($e);
		return $max;
	}
	
	private function multiMin($a){
		$min = 100000000;
		foreach($a as $e)
			if(min($e)<$min)
				$min = min($e);
		return $min;
	}
	
	function actSort($a,$b){
		return strnatcasecmp($a[0],$b[0]);
	}
	
	private function indSort($e){
		for($i=0;$i<$this->numPoints[$e];$i++)
			$tiVars[] = array($this->iVars[$e][$i],$this->dVars[$e][$i],$this->ids[$e][$i]);
		usort($tiVars,array("graph","actSort"));
		foreach($tiVars as $k => $g){
			$this->iVars[$e][$k] = $g[0];
			$this->dVars[$e][$k] = $g[1];
			$this->ids[$e][$k] = $g[2];
		}
	}
	
	private function drawBar($x1,$y1,$x2,$y2,$ccol){
		$mode = $this->getProp("barstyle",0);
		$colorlist = $this->getProp("colorlist",false);
		if($colorlist === true || $colorlist === 1 || $colorlist === "true")
			$colorlist = array(array(255, 203, 3),array(220, 101, 29),array(189, 24, 51),array(214, 0, 127),array(98, 1, 96),array(0, 62, 136),array(0, 102, 179),array(0, 145, 195),array(0, 115, 106),array(178, 210, 52),array(137, 91, 74),array(82, 56, 47));
		if($colorlist)
			$color = $colorlist[$ccol];
			if(!isset($color[3]))
				$color[3] = 0;
		else
			$color = $this->getProp("color",array(0,0,255,0));
		$bord = $this->getProp("bordercolor",array(0,0,0,0));
		switch($mode){
			case 0:
				if($this->mode!="div"){
					imagefilledrectangle($this->img,$x1,$y1,$x2,$y2,imagecolorallocatealpha($this->img,$color[0],$color[1],$color[2],$color[3]));
					imagerectangle($this->img,$x1,$y1,$x2,$y2,imagecolorallocatealpha($this->img,$bord[0],$bord[1],$bord[2],$bord[3]));
				} else {
					$this->div->setColor($color[0],$color[1],$color[2]);
					$this->div->drawFilledRect($x1,$y1,$x2-$x1,$y2-$y1);
					$this->div->setColor($bord[0],$bord[1],$bord[2]);
					$this->div->drawRect($x1,$y1,$x2-$x1,$y2-$y1);
				}
				break;
			case 1:
				$ge = $this->getProp("gendcolor",array(0,0,0,0));
				$gs = $this->getProp("gstartcolor",array(255,255,255,0));
				for($i=0;$i<4;$i++){
					$c[$i] = ($ge[$i]-$gs[$i])/($y2-$y1);
					$cc[$i] = $gs[$i];
				}
				for($y=$y1;$y<$y2;$y++){
					for($i=0;$i<4;$i++)
						$cc[$i] += $c[$i];
					if($this->mode!="div")
						imageline($this->img,$x1,$y,$x2,$y,imagecolorallocatealpha($this->img,$cc[0],$cc[1],$cc[2],$cc[3]));
					else {
						$this->div->setColor($cc[0],$cc[1],$cc[2]);
						$this->div->drawLine($x1+1,$y,$x2,$y);
					}
				}
				break;
			default:
				$this->error("Bar style not understood.");
				break;
		}
	}
	private function flipMulti(&$arr){
		foreach($arr as $i => $e)
			foreach($e as $j => $k)
				$n[$j][$i] = $k;
		$arr = $n;
	}
	function pieSort($a,$b){
		return ($a==$b?0:(abs($a-90)>abs($b-90)?-1:1));
	}
	private function drawPie($ex){
		$cx = $this->width/2;
		$cy = $this->height/2+20;
		$ang = $this->getProp("pieangle",35);
		if($ang>90)
			$this->error("Angles over 90 cannot be properly graphed.");
		$h = min($this->width,$this->height-10);
		$h = ($h*((90-$ang)/90))+3;
		$w = min(min($this->width,$this->height-10)+$ang*1.5,$this->width);
		$colorlist = $this->getProp('colorlist',array(array(125, 203, 3),array(220, 101, 29),array(189, 24, 51),array(34, 78, 120),array(120, 1, 60),array(0, 62, 136),array(0, 102, 179),array(0, 145, 195),array(0, 115, 106),array(178, 210, 52),array(137, 91, 74),array(82, 56, 47)));
		$da['data'] = $this->dVars[$ex];
		$da['key'] = $this->iVars[$ex];
		foreach($da['data'] as $i => $e){ //Allocate colors
			$rcolor[$i] = imagecolorallocate($this->img,$colorlist[$i][0],$colorlist[$i][1],$colorlist[$i][2]);
			$dcolor[$i] = imagecolorallocate($this->img,abs($colorlist[$i][0]-30),abs($colorlist[$i][1]-30),abs($colorlist[$i][2]-30));
		}
		$datasum = array_sum($da['data']);
		for($i=0;$i<count($da['data']);$i++)
			$da['part'][$i] = $da['data'][$i] / $datasum; //Get percents
		if(($fd=array_sum($da['part']))<1)
			$da['part'][count($da['part'])-1] += 1-$fd;
		for($i=0;$i<count($da['data']);$i++)	
			$da['angle'][$i] = $da['part'][$i] * 360; //Get angles
		for($i=0;$i<count($da['data']);$i++)
			@$da['ansum'][$i] = array_sum(array_slice($da['angle'],0,$i+1)); //Get sums from 0 to each angle
		for($i=1;$i<count($da['ansum'])+1;$i++)
			$sortkeys[] = $da['ansum'][$i-1];//Create sort array to make sure pie is graphed back to front
		for($i=1;$i<count($sortkeys)+1;$i++)
			if($sortkeys[$i-1]<90 && $sortkeys[$i]>90) // Make sure the one that actually crosses 90 is last
				$sortkeys[$i] = 90;
		uasort($sortkeys,array('graph','piesort'));
		$sk = array_keys($sortkeys);
		for($p=0;$p<=count($da['data'])-1;$p++){
			$n = $sk[$p];
			$f = $n - 1;
			if ($da['angle'][$n] != 0)
				for ($i = 0; $i < $ang; $i++)
					if(($da['ansum'][$n]<=180 || $da['ansum'][$f]<=180) || ($n == count($da['data'])-1)) //Draw 3d
						@imagefilledarc($this->img, $cx, $cy+$i, $w, $h, $da['ansum'][$f], $da['ansum'][$n], ($n==count($da['data'])-1?$rcolor[$n]:$dcolor[$n]), IMG_ARC_PIE);
		}
		for($i=0;$i<=count($da['data'])-1;$i++){
		   $n = $i - 1;
		   if ($da['angle'][$i] != 0) //Draw top
		       @imagefilledarc($this->img, $cx, $cy, $w, $h, $da['ansum'][$n], $da['ansum'][$i], $rcolor[$i], IMG_ARC_PIE);
		}
		for($i=0;$i<count($da['data']);$i++)
			@$da['ansum'][$i] = array_sum(array_slice($da['angle'],0,$i+1));
		for($i=0;$i<count($da['data']);$i++){ //Draw keys
			$text = ($this->getProp("useval",false)?$da['data'][$i]:round($da['part'][$i]*100,0).'%');
			$size = imagettfbbox($this->getProp("textsize",8),$this->getProp("textAngle",0),$this->getProp("font","arial.ttf"),$text);
			$avang = ($da['ansum'][$i-1]+$da['ansum'][$i])/2;
			imagettftext($this->img,$this->getProp("textsize",8),$this->getProp("textAngle",0),cos(deg2rad($avang))*$w/2+$cx+($avang<90||$avang>270?$this->getProp("numspace",5):-$size[2]-$this->getProp("numspace",5)),sin(deg2rad($avang))*$h/2+$cy+($avang<180&&$avang>0?-$size[5]+$ang:$size[5]),imagecolorallocate($this->img,0,0,0),$this->getProp("font","arial.ttf"),$text);
		}
	}
	
	private function internalGraph(){
		for($i=0;$i<count($this->numPoints);$i++){
			if($this->getProp("reverse",0,$i)==1)
				$this->dVars = array_reverse($this->dVars[$i]);
			if($this->getProp("flip",0,$i)==1){
				$this->dVars = array_reverse($this->dVars[$i]);
				$this->iVars = array_reverse($this->iVars[$i]);
			}
			if($this->getProp("sort",true,$i)==true)
				$this->indSort($i);
		}
		$time = microtime(true);
		for($k=0;$k<$this->lines;$k++)
			if(isset($this->numPoints[$k])==false || $this->numPoints[$k]<2)
				$this->error("Not enough points in dataset ".$k);
		if($this->getProp("autoSize",true)){
			$this->xMax = $this->multiMax($this->iVars);
			$this->yMax = $this->multiMax($this->dVars);
			$this->xMin = $this->multiMin($this->iVars);
			$this->yMin = $this->multiMin($this->dVars);
		}
		if($this->getProp("type","line")=="bar" && $this->getProp("barnone",true)){
			$this->yMin = 0;
			$this->setProp("xincpts",$this->numPoints[0]);
		}
		if($this->getProp("autoScl")){
			$this->setProp("xsclmax",$this->xMax);
			$this->setProp("ysclmax",$this->yMax);
			$this->setProp("xsclmin",$this->xMin);
			$this->setProp("ysclmin",$this->yMin);
		}
		
		$this->setProp("xSclInc",(($this->getProp("xsclmax")-$this->getProp("xsclmin"))/(float)$this->getProp("xsclpts"))*$this->width/(float)($this->getProp("xsclmax")-$this->getProp("xsclmin")));
		$this->setProp("ySclInc",(($this->getProp("ysclmax")-$this->getProp("ysclmin"))/(float)$this->getProp("ysclpts"))*$this->height/(float)($this->getProp("ysclmax")-$this->getProp("ysclmin")));
		$this->xPts = array();
		$this->yPts = array();
		foreach($this->iVars as $e => $g){
			foreach($g as $k => $i){
				$f = $this->xScale($i);
				$this->xPts[$e][] = $f;
			}
		}
		foreach($this->dVars as $e => $g){
			foreach($g as $k => $i){
				$f = $this->yScale($i);
				$this->yPts[$e][] = $f;
			}
		}
		$backcolor = $this->getProp("backcolor");
		$grids = $this->getProp("gridcolor",array(80,80,80));
		$this->img = imagecreatetruecolor($this->getProp("actwidth"),$this->getProp("actheight"));//Create image.
		$back = imagecolorallocate($this->img,$backcolor[0],$backcolor[1],$backcolor[2]);
		$grid = imagecolorallocate($this->img,$grids[0],$grids[1],$grids[2]);
		imagefill($this->img,0,0,$back);//Fill with back color
		if($this->getProp("showgrid",true)){
			for($i=0;$i<round($this->getProp("sclline")*$this->getProp("onfreq"),0);$i++)//Create grid line style
				$style[] = $grid;
			for($i=0;$i<round($this->getProp("sclline")*(1-$this->getProp("onfreq")),0);$i++)
				$style[] = IMG_COLOR_TRANSPARENT;
			imagesetstyle($this->img, $style);
			if($this->getProp("showxgrid",true))
				for($i=1;$i<$this->getProp("xsclpts");$i++)//Create grid
					if($this->mode=='image')
						imageline($this->img, round($i*$this->getProp("xSclInc"),0), 0, round($i*$this->getProp("xSclInc"),0), $this->height, IMG_COLOR_STYLED);
					else{
						$this->div->setColor($grids[0],$grids[1],$grids[2]);
						$this->div->setStyle('dotted');
						$this->div->drawLine(round($i*$this->getProp("xSclInc"),0),0,round($i*$this->getProp("xSclInc"),0),$this->height);
					}
			if($this->getProp("showygrid",true))
				for($i=1;$i<$this->getProp("ysclpts");$i++)
					if($this->mode=='image')
						imageline($this->img, 0, round($i*$this->getProp("ySclInc"),0), $this->width, round($i*$this->getProp("ySclInc"),0), IMG_COLOR_STYLED);
					else
						$this->div->drawLine(0,round($i*$this->getProp("ySclInc"),0),$this->width,round($i*$this->getProp("ySclInc"),0));
			if($this->mode=='image'){
				imageline($this->img, 0, $this->height-1, $this->width-1, $this->height-1, IMG_COLOR_STYLED);//Last lines
				imageline($this->img, $this->width-1, $this->height-1, $this->width-1, 0, IMG_COLOR_STYLED);
				imageline($this->img, 0, $this->height, 0, 0, IMG_COLOR_STYLED);
				imageline($this->img, 0, 0, $this->width, 0, IMG_COLOR_STYLED);
			} else {
				$this->div->drawLine(0,$this->height-1,$this->width-1,$this->height-1);
				$this->div->drawLine($this->width-1,$this->height-1,$this->width-1,0);
				$this->div->drawLine(0,$this->height,0,0);
				$this->div->drawLine(0,0,$this->width,0);
				$this->div->setStyle(1);
			}
		}
		if($this->getProp("type","line")!="pie"){
			if($this->getProp("showhorizscale",true)){
				if($this->getProp("scale","numeric")=="date"){
					$start = $this->getProp("startdate",-9);
					$end = $this->getProp("enddate",time());
					if(is_string($start))
						$start = strtotime($start);
					if(is_string($end))
						$end = strtotime($end);
					$start = getdate($start);
					$end = getdate($end);
					$dDate = ($end[0] - $start[0])/$this->getProp("xincpts");
					$showyr = $this->getProp("showyear",($start['year']!=$end['year']));
					$format = $this->getProp("dateformat",1);
				} elseif (is_array($this->getProp("scale","numeric"))) {
					$scale = $this->getProp("scale");
					$this->setProp("xincpts",count($scale)-1);
				}
				for($i=0;$i<$this->getProp("xincpts")+1;$i++){//Create horiz scale
					if($this->getProp("scale","numeric")=="numeric"){
						$text = ($this->getProp("type","line")=="bar"?$i:trim(round((($i/$this->getProp("xincpts"))*($this->xMax-$this->xMin))+$this->xMin,1)));
					} elseif ($this->getProp("scale","numeric")=="date") {
						$date = getdate($start[0]+($i*$dDate));
						$text = ($format<=2?substr($date['month'],0,3):$date['month']);
						if($showyr)
							$text .= " ".substr($date['year'],($format==4 || $format==2?0:2),($format==4 || $format==2?4:2));
					} elseif (is_array($this->getProp("scale","numeric"))){
						$text = $scale[$i];
					} else
						$this->error("Scale format not understood.");
					$size = imagettfbbox($this->getProp("textsize",8),$this->getProp("textAngle",0),$this->getProp("font","arial.ttf"),$text);
					if($this->mode=="image")
						imagettftext($this->img,$this->getProp("textsize",8),$this->getProp("textAngle",0),round(($i*($this->width/$this->getProp("xincpts")))-($i!=$this->getProp("xincpts")?($i!=0?(.5*$size[2]):0):$size[2]),0)-($this->getProp("type","line")=="bar"?.5*($this->width/count($this->xPts[0])):0),$this->height+abs($size[5])+3,$grid,$this->getProp("font","arial.ttf"),$text);
					else {
						$this->div->setFontSize(8);
						$this->div->drawString(round(($i*($this->width/$this->getProp("xincpts")))-($i!=$this->getProp("xincpts")?($i!=0?(.5*$size[2]):0):$size[2]),0)-($this->getProp("type","line")=="bar"?.5*($this->width/count($this->xPts[0])):0),$this->height,$text);
					}
				}
			}
			if($this->getProp("showvertscale",true)){
				for($i=0;$i<$this->getProp("yincpts")+1;$i++){//Create vert scale
					$text = trim(round((($i/$this->getProp("yincpts"))*($this->yMax-$this->yMin))+$this->yMin,1));
					$size = imagettfbbox($this->getProp("textsize",8),$this->getProp("textAngle",0),$this->getProp("font","arial.ttf"),$text);
					if($this->mode=="image")
						imagettftext($this->img,$this->getProp("textsize",8),$this->getProp("textAngle",0),$this->width+3,round((($this->getProp("yincpts")-$i)*($this->height/$this->getProp("yincpts")))-($text!=$this->yMax?($text!=$this->yMin?(.5*$size[5]):0):$size[5]),0),$grid,$this->getProp("font","arial.ttf"),$text);
					else {
						$this->div->setFontSize(8);
						$this->div->drawString($this->width+3,round((($this->getProp("yincpts")-$i)*($this->height/$this->getProp("yincpts")))-($i==0?abs($size[5]):0),0),$text);
					}
				}
			}
		}
		foreach($this->xPts as $ex => $ind){
			$xPts = $this->xPts[$ex];
			$yPts = $this->yPts[$ex];	
			$g = $this->width/count($xPts);
			$color = $this->getProp("color",array(0,0,255,0),$ex);
			$fore = imagecolorallocatealpha($this->img,$color[0],$color[1],$color[2],$color[3]);
			if($this->getProp("type","line")=="line") //Draw graph
				for($i=1;$i<$this->numPoints[$ex];$i++){
					$this->imageSmoothAlphaLine($this->img,$xPts[$i-1],$this->height-$yPts[$i-1],$xPts[$i],$this->height-$yPts[$i],$color[0],$color[1],$color[2],$color[3]);
				}
			elseif($this->getProp("type","line")=="bar")
				for($i=0;$i<$this->numPoints[$ex];$i++)
					$this->drawBar($g*$i+($i==0?$g*(1-$this->getProp("barwidth",1)):0),$this->height-$yPts[$i],$g*$i+$this->getProp("barwidth",1)*$g,$this->height-1,$i);
			elseif($this->getProp("type","line")=="pie")
				$this->drawPie($ex);
			elseif($this->getProp("type","line")!="dot")
				$this->error("Type property not understood.",E_USER_ERROR);
			$width = $this->getProp("pointwidth",5,$ex);
			$height = $this->getProp("pointheight",$width,$ex);
			$point = $this->getProp("pointcolor",$color,$ex);
			$col = imagecolorallocatealpha($this->img,$point[0],$point[1],$point[2],$point[3]);
			if($this->getProp("pointstyle",0,$ex)!=0){
				foreach($xPts as $k => $xpt){
					$x = $xPts[$k];
					$y = $this->height-$yPts[$k];
					if($this->getProp("endstyle",0,$ex)!=0 && $k==count($xPts)-1)
						continue;
					switch($this->getProp("pointstyle",0,$ex)){ //Draw points
						case 1: //Filled rectangle
							imagefilledrectangle($this->img,$x-.5*$width,$y-.5*$height,$x+.5*$width,$y+.5*$height,$col);
							break;
						case 2: //Open rectangle
							if(!$this->getProp("clearback",false,$ex))
								imagefilledrectangle($this->img,$x-.5*$width,$y-.5*$height,$x+.5*$width,$y+.5*$height,$back);
							imagerectangle($this->img,$x-.5*$width,$y-.5*$height,$x+.5*$width,$y+.5*$height,$col);
							break;
						case 3: //Filled Triangle	
							imagefilledpolygon($this->img,array($x-.5*$width,$y+.5*$height,$x+.5*$width,$y+.5*$height,$x,$y-.5*$height),3,$col);
							break;
						case 4: //Open Triangle	
							if(!$this->getProp("clearback",false,$ex))
								imagefilledpolygon($this->img,array($x-.5*$width,$y+.5*$height,$x+.5*$width,$y+.5*$height,$x,$y-.5*$height),3,$back);
							imagepolygon($this->img,array($x-.5*$width,$y+.5*$height,$x+.5*$width,$y+.5*$height,$x,$y-.5*$height),3,$col);
							break;
						case 5: //Filled n-gon, for testing only!
							$n = $this->getProp("pointsides",7);
							if($n<7)
								$this->error("Point shape must be 7 or more sides!");
							elseif($n>30)
								$this->error("Just use a circle ;)");
							$s = $width;
							unset($points);
							for($i=1;$i<$n+1;$i++){
								$o=($i)*(360/$n);
								$points[] = ($s*cos($o))+$x;
								$points[] = ($s*sin($o))+$y;
							}
							imagefilledpolygon($this->img,$points,$n,$col);
							break;
						case 6: //Open n-gon, for testing only!
							$n = $this->getProp("pointsides",7,$ex);
							if($n<7)
								$this->error("Point shape must be 7 or more sides!");
							elseif($n>30)
								$this->error("Just use a circle ;)");
							$s = $width;
							unset($points);
							for($i=1;$i<$n+1;$i++){
								$o=($i)*(360/$n);
								$points[] = ($s*cos($o))+$x;
								$points[] = ($s*sin($o))+$y;
							}
							if(!$this->getProp("clearback",false,$ex))
								imagefilledpolygon($this->img,$points,$n,$back);
							imagepolygon($this->img,$points,$n,$col);
							break;
						case 7:	//Filled ellipse, make width = height for a circle
							imagefilledellipse($this->img,$x,$y,$width,$height,$col);
							break;
						case 8: //Open ellipse
							if(!$this->getProp("clearback",false,$ex))
								imagefilledellipse($this->img,$x,$y,$width,$height,$back);
							imageellipse($this->img,$x,$y,$width,$height,$col);
							break;
						case 9: //Image
							if($this->getProp("pointimgsrc",false,$ex)===false)
								$this->error("You must set the pointimgsrc property before using the image point style",true);
							if(!isset($this->imgCache)){
								$im = $this->loadimg($this->getProp("pointimgsrc",false,$ex));
								if($this->getProp("pointimgscale",false,$ex))
									$height = round($width*(ImageSX($im)/ImageSY($im)),0);
								$tmp = imagecreatetruecolor($width,$height);
								if(!imagecopyresized($tmp,$im,0,0,0,0,$width,$height,ImageSX($im),ImageSY($im)))
									$this->error("Error resizing point image");
								$this->cacheImg($tmp);
							}
								$tmp = $this->cacheImg();
								if(!imagecopy($this->img,$tmp,$x-.5*$width,$y-.5*$height,0,0,$width,$height))
									$this->error("Error inserting point image");
							break;
					}
				}
				unset($this->imgCache);
			}
			$arrow = $this->getProp("arrowcolor",$color,$ex);
			$col = imagecolorallocatealpha($this->img,$arrow[0],$arrow[1],$arrow[2],$arrow[3]);
			$x2 = $xPts[count($xPts)-1];
			$y2 = $this->height-$yPts[count($yPts)-1];
			$x1 = $xPts[count($xPts)-2];
			$y1 = $this->height-$yPts[count($yPts)-2];
			switch($this->getProp("endstyle",0,$ex)){//Draw end
				case 1: //Open arrow
					$arrhead = $this->getProp("arrowwidth",25,$ex);
					$arrang = $this->getProp("arrowangle",14,$ex);
					$arrow = $this->drawArrowheads ($x1, $y1, $x2, $y2, $arrhead, $arrang);
					if(!$this->getProp("clearback",false,$ex))
						imagefilledpolygon($this->img,array (
							$arrow['x1'], $arrow['y1'],
							$arrow['x2'], $arrow['y2'],
							$x2, $y2
						),3,$back);
					imageline($this->img, $arrow['x1'], $arrow['y1'], $arrow['x2'], $arrow['y2'], $col);
					imageline($this->img, $x2, $y2, $arrow['x1'], $arrow['y1'], $col);
					imageline($this->img, $x2, $y2, $arrow['x2'], $arrow['y2'], $col);
					break;
				case 2: //Filled arrow
					$arrhead = $this->getProp("arrowwidth",25,$ex);
					$arrang = $this->getProp("arrowangle",14,$ex);
					$arrow = $this->drawArrowheads ($x1, $y1, $x2, $y2, $arrhead, $arrang);
					imagefilledpolygon($this->img,array (
						$arrow['x1'], $arrow['y1'],
						$arrow['x2'], $arrow['y2'],
						$x2, $y2
					),3,$col);
					break;
			}
		}
		$sX = ImageSX($this->img);
		$sY = ImageSY($this->img);
		$font = $this->getProp("font","arial.ttf");
		$labels = $this->getProp("labelcolor",array(0,0,0,0));
		$label = imagecolorallocatealpha($this->img,$labels[0],$labels[1],$labels[2],$labels[3]);
		$fX = $sX;
		$fY = $sY;
		$tB = 0;
		if($this->getProp("title",false)!==false){
			$title = $this->getProp("title");
			$tsize = imagettfbbox($this->getProp("titlesize",24),0,$font,$title);
			$tB = abs($tsize[5])+10;
			$fY += $tB + 5;		
		}	
		if($this->getProp("xlabel",false)!==false){
			$xlabel = $this->getProp("xlabel");
			$xsize = imagettfbbox($this->getProp("labelsize",14),0,$font,$xlabel);
			$fY += abs($xsize[5])+10;		
		}
		if($this->getProp("ylabel",false)!==false){
			$ylabel = $this->getProp("ylabel");
			$ysize = imagettfbbox($this->getProp("labelsize",14),90,$font,$ylabel);
			$fX += abs($ysize[2])+15;		
		}		
		if($fX != $sX || $fY != $sY){
			$timg = imagecreatetruecolor($fX,$fY);
			imagecopy($timg,$this->img,0,$tB,0,0,$sX,$sY);
			imagefill($timg,0,0,$back);
			if($this->getProp("ylabel",false)!==false)
				imagettftext($timg,$this->getProp("labelsize",14),90,$sX+10,round(($fY-$ysize[5])/2,0),$label,$font,$ylabel);
			if($this->getProp("xlabel",false)!==false)
				imagettftext($timg,$this->getProp("labelsize",14),0,round(($fX-abs($xsize[2]))/2,0),$sY+$tB+5,$label,$font,$xlabel);
			if($this->getProp("title",false)!==false)
				imagettftext($timg,$this->getProp("titlesize",24),0,round(($fX-abs($tsize[2]))/2,0),abs($tsize[5]),$label,$font,$title);
			$this->img = $timg;
		}
		if($this->getProp("benchmark",false))
			echo (round(microtime(true) - $time,3)*1000)."ms";
		if($this->getProp("showkey",false)){
			$acthei = $this->getProp("actheight",$this->height);
			$actwid = $this->getProp("actwidth",$this->width);
			$size = $this->getProp("keysize",10);
			$font = $this->getProp("keyfont","arial.ttf");
			$indhei = 0;
			$indwid = 0;
			$type = $this->getProp("type",'line');
			if($type!='line'){
				$keys = $this->getProp('key',false);
				$num = $this->numPoints[0];
				$dis = $this->getProp("keyinfo",0);
				if($dis>3 || $dis<0)
					$this->error("keyinfo not understood.");
				if($dis!=0){
					$d = $this->dVars[0];
					$g = array_sum($d);
					foreach($d as $i => $e)
						$pr[] = ($e/$g)*100;
					if(($fd=array_sum($pr))<1)
						$pr[count($pr)-1] += 1-$fd;
					foreach($d as $i => $e)
						$p[] = round($pr[$i],0).'%';
					if($dis==1 || $dis==3)
						foreach($keys as $i => $k)
							$keys[$i] = $p[$i].' '.$k;
					if($dis==2 || $dis==3)
						foreach($keys as $i => $k)
							$keys[$i] = $d[$i].' '.$k;	
				}
			} else
				$num = $this->lines;
			for($i=0;$i<$num;$i++){
				if($type=='line'){
					$keys[$i] = $this->getProp("key",false,$i);
					if($keys[$i]==false)
						$this->error("You must set the keys property for dataset $i.");
				}
				$ksize[$i][size] = imagettfbbox($size,0,$font,$keys[$i]);
				$indhei = max($indhei,$ksize[$i][height] = abs($ksize[$i][size][5]));
				$indwid = max($indwid,$ksize[$i][width] = abs($ksize[$i][size][2])+$indhei+5);
			}
			$indhei += 4;
			$indwid += 10;
			$wspc = $this->getProp("keywidspc",10);
			$oldwid = $actwid;
			$oldhei = $acthei;
			$khei = $indhei*$num+14;
			$actwid = $actwid+$indwid+$wspc;
			$acthei = max($acthei,$khei);
		 	$timg = imagecreatetruecolor($actwid,$acthei);
		 	$backcolor = $this->getProp("backcolor");
		 	$back = imagecolorallocate($this->img,$backcolor[0],$backcolor[1],$backcolor[2]);
		 	imagefill($timg,0,0,$back);
		 	imagecopy($timg,$this->img,0,0,0,0,$oldwid,$oldhei);
		 	$this->img = $timg;
		 	$y = ($acthei-$khei)/2;
		 	$x = $oldwid+$wspc+4;
		 	imagerectangle($this->img,$x-4,$y,$actwid-1,$khei+($acthei-$khei)/2+4,imagecolorallocate($this->img,0,0,0));
		 	$black = imagecolorallocate($this->img,0,0,0);
			if($this->getProp('type','line')=='bar'){
				$colorlist = $this->getProp("colorlist",false);
				if($colorlist === true || $colorlist === 1 || $colorlist === "true")
					$colorlist = array(array(255, 203, 3),array(220, 101, 29),array(189, 24, 51),array(214, 0, 127),array(98, 1, 96),array(0, 62, 136),array(0, 102, 179),array(0, 145, 195),array(0, 115, 106),array(178, 210, 52),array(137, 91, 74),array(82, 56, 47));
				if($colorlist)
					$col = $colorlist[$i-1];
				else
					$this->error("colorlist must be set for keys to work.",E_USER_ERROR);
			} else
				$colorlist = $this->getProp('colorlist',array(array(125, 203, 3),array(220, 101, 29),array(189, 24, 51),array(34, 78, 120),array(120, 1, 60),array(0, 62, 136),array(0, 102, 179),array(0, 145, 195),array(0, 115, 106),array(178, 210, 52),array(137, 91, 74),array(82, 56, 47)));
			foreach($keys as $i => $k){
		 		if($type=='line')
					$col = $this->getProp("color",array(0,0,255,0),$i);
				else
					$col = $colorlist[$i];
		 		$fco = imagecolorallocatealpha($this->img,$col[0],$col[1],$col[2],$col[3]);
		 		imagefilledrectangle($this->img,$x,$y+=4,$x+$indhei-4,$y+=$indhei-2,$fco);
		 		$y-=$indhei-2+4;
		 		imagerectangle($this->img,$x,$y+=4,$x+$indhei-4,$y+=$indhei-2,$black);
		 		imagettftext($this->img,$size,0,$x+$indhei,$y-1,$black,$font,$k);
		 	}
		}
		$this->error(true);
		return true;
	}
	
	private function loadimg($file){
		if(substr($file,-4)==".png")
			$im = imagecreatefrompng($file);
		elseif(substr($file,-4)==".gif")
			$im = imagecreatefromgif($file);
		elseif(substr($file,-4)==".jpg" || substr($file,-5)==".jpeg")
			$im = imagecreatefromjpeg($file);
		elseif(substr($file,-4)==".bmp")
			$im = imagecreatefromwbmp($file);
		else
			$this->error("Image format not understood",true);
		return $im;
	}
	
	private function imageSmoothAlphaLine ($image, $x1, $y1, $x2, $y2, $r, $g, $b, $alpha=0) { //Thanks php.net poster
		if($this->mode=='image'){
			if($x2==$x1)
				$x2++;
			if($y2==$y1)
				$y2++;
			$icr = $r;$icg = $g;$icb = $b;$dcol = imagecolorallocatealpha($image, $icr, $icg, $icb, $alpha);$m = ($y2 - $y1) / ($x2 - $x1);$b = $y1 - $m * $x1;
			if (abs ($m) <2) {
				$x = min($x1, $x2);$endx = max($x1, $x2) + 1;
				while ($x < $endx) {
					$y = $m * $x + $b;$ya = ($y == floor($y) ? 1: $y - floor($y));$yb = ceil($y) - $y;$trgb = ImageColorAt($image, $x, floor(abs($y)));$tcr = ($trgb >> 16) & 0xFF;$tcg = ($trgb >> 8) & 0xFF;$tcb = $trgb & 0xFF;imagesetpixel($image, $x, floor($y), imagecolorallocatealpha($image, ($tcr * $ya + $icr * $yb), ($tcg * $ya + $icg * $yb), ($tcb * $ya + $icb * $yb), $alpha));$trgb = ImageColorAt($image, $x, ceil(abs($y)));$tcr = ($trgb >> 16) & 0xFF;$tcg = ($trgb >> 8) & 0xFF;$tcb = $trgb & 0xFF;imagesetpixel($image, $x, ceil($y), imagecolorallocatealpha($image, ($tcr * $yb + $icr * $ya), ($tcg * $yb + $icg * $ya), ($tcb * $yb + $icb * $ya), $alpha));$x++;
				}
			} else {
				$y = min($y1, $y2);$endy = max($y1, $y2) + 1;
				while ($y < $endy) {
					@$x = ($y - $b) / $m;
					$xa = ($x == floor($x) ? 1: $x - floor($x));$xb = ceil($x) - $x;$trgb = ImageColorAt($image, floor(abs($x)), $y);$tcr = ($trgb >> 16) & 0xFF;$tcg = ($trgb >> 8) & 0xFF;$tcb = $trgb & 0xFF;
					imagesetpixel($image, floor($x), $y, imagecolorallocatealpha($image, ($tcr * $xa + $icr * $xb), ($tcg * $xa + $icg * $xb), ($tcb * $xa + $icb * $xb), $alpha));$trgb = ImageColorAt($image, ceil(abs($x)), $y);$tcr = ($trgb >> 16) & 0xFF;$tcg = ($trgb >> 8) & 0xFF;$tcb = $trgb & 0xFF;imagesetpixel ($image, ceil(abs($x)), $y, imagecolorallocatealpha($image, ($tcr * $xb + $icr * $xa), ($tcg * $xb + $icg * $xa), ($tcb * $xb + $icb * $xa), $alpha));$y++;
				}
			}
		} else {
			$this->div->setColor($r,$g,$b);
			$this->div->drawLine($x1,$y1,$x2,$y2);
		}
	}
	private function drawArrowheads ($x1, $y1, $x2, $y2, $arrhead, $arrang) { //Thanks php.net poster (tried to do the math myself, not fun :()
		$debug = false;
		if (($x2-$x1)==0) {
		   if ($y1 == 0) {
			   $slope = 0;
		   } else {
			   $slope = 'INFINITE';
		   }
		} else {
		   $slope = -($y2-$y1)/($x2-$x1);
		}
		if ($debug) {
		   echo ("Values of xy.. before add/sub</br>");
		   echo ("$x1, $y1   $x2, $y2</br>");
		}
		if ($slope == 'INFINITE') {
		   $ang = 90;
		} else {
		   $ang = atan ($slope);
		   $ang = ($ang * 180)/pi();
		}
		$arrang1 = ($ang - $arrang);
		$arrang1 = ($arrang1*pi())/180;
		$arrang2 = ($ang + $arrang);
		$arrang2 = ($arrang2*pi())/180;
		$arx1 = (floor(cos($arrang1)*$arrhead));
		$ary1 = (floor(sin($arrang1)*$arrhead));
		$arx2 = (floor(cos($arrang2)*$arrhead));
		$ary2 = (floor(sin($arrang2)*$arrhead));
		if($ang==0)
			if($x2>$x1){
				$arx1=$x2-$arx1;$ary1=$y2-$ary1;$arx2=$x2-$arx2;$ary2=$y2-$ary2;
			}elseif($x2<$x1){
				$arx1=$x2+$arx1;$ary1=$y2-$ary1;$arx2=$x2+$arx2;$ary2=$y2-$ary2;
			}
		if($ang>0&&$ang<90)
			if(($x2>$x1)&&($y2<$y1)){
				$arx1=$x2-$arx1;$ary1=$y2+$ary1;$arx2=$x2-$arx2;$ary2=$y2+$ary2;
			}elseif(($x2<$x1)&&($y2>$y1)){
				$arx1=$x2+$arx1;$ary1=$y2-$ary1;$arx2=$x2+$arx2;$ary2=$y2-$ary2;
			}
		if($ang==90)
			if(($y2>$y1)){
				$arx1=$x2-$arx1;$ary1=$y2-$ary1;$arx2=$x2-$arx2;$ary2=$y2-$ary2;
			}elseif(($y2<$y1)){
				$arx1=$x2-$arx1;$ary1=$y2+$ary1;$arx2=$x2-$arx2;$ary2=$y2+$ary2;
			}
		if($ang>-90&&$ang<0)
			if(($x2>$x1)&&($y2>$y1)){
				$arx1=$x2-$arx1;$ary1=$y2+$ary1;$arx2=$x2-$arx2;$ary2=$y2+$ary2;
			}elseif(($x2<$x1)&&($y2<$y1)){
				$arx1=$x2+$arx1;$ary1=$y2-$ary1;$arx2=$x2+$arx2;$ary2=$y2-$ary2;
			}
		$array_arrows=array('x1'=>$arx1,'y1'=>$ary1,'x2'=>$arx2,'y2'=>$ary2);
		return $array_arrows;
	} 
	public function showGraph($show = true){
		if($this->mode=='image'){
			if($show === true){
				if(!$this->getProp("noheader",false))
					header('Content-type: image/'.$this->getProp('imagetype','png'));
				switch($this->getProp("imagetype","png")){
					case 'png':
						imagepng($this->img);break;
					case 'jpeg':
						imagejpeg($this->img);break;
					case 'gif':
						imagegif($this->img);break;
					default:
						$this->error('imagetype not understood.');
				}
				return true;
			}elseif($show == "random" || $show === false){
				$name = $this->getProp("imagepre","")."graphImage".($show=="random"?rand(1000000,10000000):"").'.'.$this->getProp('imagetype','png');
				switch($this->getProp("imagetype","png")){
					case 'png':
						imagepng($this->img,$name);break;
					case 'jpeg':
						imagejpeg($this->img,$name);break;
					case 'gif':
						imagegif($this->img,$name);break;
					default:
						$this->error('imagetype not understood.');
				}
				return $name;
			} else {
				switch($this->getProp("imagetype","png")){
					case 'png':
						imagepng($this->img,$show);break;
					case 'jpeg':
						imagejpeg($this->img,$show);break;
					case 'gif':
						imagegif($this->img,$show);break;
					default:
						$this->error('imagetype not understood.');
				}
				return $show;
			}
		} else {
			$this->div->draw();
		}
		return true;
	}
	private static function trimfilter($a){
		if(trim($a)=="")
			return false;
		else
			return true;
	}
	public static function createGraph($data,$w=400,$h=200,$prop="",$random=false){
		self::$numGraphs++;
		$graph = new graph($w,$h);
		if(is_array($prop))
			$graph->storePropArr($prop);
		else
			$graph->setBulkProps($prop);
		$data = explode(":",$data);
		$dt = $data[1];
		if(strtoupper($data[0])=="XML")
			$graph->importXML($dt,(isset($data[2])?$data[2]:"i"),(isset($data[3])?$data[3]:"d"),(isset($data[4])?$data[4]:""),(isset($data[5])?$data[5]:0));
		elseif(strtoupper($data[0])=="CSV")
			$graph->importCSV($dt,(isset($data[2])?$data[2]:"d,i"),(isset($data[3])?$data[3]:0));
		elseif(strtoupper($data[0])=="RAW")
			$graph->addBulkPoints($dt,';');
		elseif(strtoupper($data[0])=="FUN")
			$graph->graphFunction($dt,(isset($data[2])?$data[2]:-1),(isset($data[2])?$data[2]:1));
		else
			$graph->error("Inline data format not understood. Read the readme.");
		$graph->graph();
		$name = $graph->getProp("tempfolder","")."graph".substr(basename($_SERVER['PHP_SELF']),0,3).self::$numGraphs.($random==true?rand(1,100000):"").'.png';
		$graph->showGraph($name);
		if($random && $graph->getProp("delold",true)){
			$fname = $graph->getProp("tempfolder","")."imagehistory".basename($_SERVER['PHP_SELF']).".data";
			$f = @file($fname);
			if(count($f)>$graph->getProp("cachehistory",5)){
				unlink($f[0]);
				unset($f[0]);
			}
			$f[]=$name;
			file_put_contents($fname,join(array_filter($f,self::trimfilter),"\n"));
		}
		unset($graph);
		return $name;
	}
}
class jgwrap { //Wrapper class for Walter Zorn's Vector Graphics Library, http://www.walterzorn.com
	public $str,$cc,$cs,$font,$size,$div;
	public function __construct($jgo='',$font='arial'){
		define('jgw','jg');
		$this->div = $jgo;
		echo '<script type="text/javascript" src="wz_jsgraphics.js"></script>';
		$this->str = "function divDraw(){";
		$this->addDiv('setFont("'.$font.'", "12pt", Font.PLAIN)');
		$this->cc = NULL;
		$this->font = 'arial';
		$this->size = 12;
	}
	private function addDiv($add){$this->str .= jgw.'.'.$add . ";";}
	public function setColor($r,$g,$b){
		$col = array($r,$g,$b);
		if($this->cc!=$col)
			$this->addDiv('setColor("#'.sprintf('%0-2X%0-2X%0-2X',$col[0],$col[1],$col[2]).'")');
		$this->cc = $col;
	}
	public function setStyle($str){
		if($this->cs!=$str){
			if($str=='dotted')
				$this->addDiv('setStroke(Stroke.DOTTED)');
			else
				$this->addDiv('setStroke('.$str.')');
		}
		$this->cs = $str;
	}
	public function drawLine($x1,$y1,$x2,$y2){$this->addDiv('drawLine('.sprintf('%d,%d,%d,%d',$x1,$y1,$x2,$y2).')');}
	public function drawEllipse($x,$y,$w,$h){$this->addDiv('drawEllipse('.sprintf('%d,%d,%d,%d',$x,$y,$w,$h).')');}
	public function drawRect($x,$y,$w,$h){$this->addDiv('drawRect('.sprintf('%d,%d,%d,%d',$x,$y,$x+$w,$y+$h).')');}
	public function drawFilledEllipse($x,$y,$w,$h){$this->addDiv('fillEllipse('.sprintf('%d,%d,%d,%d',$x,$y,$w,$h).')');}
	public function drawFilledRect($x,$y,$w,$h){$this->addDiv('fillRect('.sprintf('%d,%d,%d,%d',$x,$y,$x+$w,$y+$h).')');}
	public function drawString($x,$y,$s){$this->addDiv('drawString("'.$s.'",'.sprintf('%d,%d',$x,$y).')');}
	public function setFontSize($s){
		if($this->size!=$s)
			$this->addDiv('setFont("'.$this->font.'","'.$this->size.'px",Font.PLAIN)');
		$this->size = $s;
	}
	public function draw(){
		echo '<script>';
		$this->addDiv('paint()');
		echo $this->str;
		echo "} \n";
		echo "var jg = new jsGraphics('$this->div');\n";
		echo "divDraw()";
		echo '</script>';
	}
}
class EvalMath { // By Miles Kaufmann
    private $suppress_errors = false;
    private $last_error = null;
    private $v = array('e'=>2.71,'pi'=>3.14);
    private $f = array();
    private $vb = array('e', 'pi');
    private $fb = array(
        'sin','sinh','arcsin','asin','arcsinh','asinh',
        'cos','cosh','arccos','acos','arccosh','acosh',
        'tan','tanh','arctan','atan','arctanh','atanh',
        'sqrt','abs','ln','log','pow');
    function EvalMath() {
        $this->v['pi'] = pi();
        $this->v['e'] = exp(1);
    }
    function e($expr) {
        return $this->evaluate($expr);
    }
    function evaluate($expr) {
        $this->last_error = null;
        $expr = trim($expr);
        if (substr($expr, -1, 1) == ';') $expr = substr($expr, 0, strlen($expr)-1);
        if (preg_match('/^\s*([a-z]\w*)\s*=\s*(.+)$/', $expr, $matches)) {
            if (in_array($matches[1], $this->vb)) {
                return $this->trigger("cannot assign to constant '$matches[1]'");
            }
            if (($tmp = $this->pfx($this->nfx($matches[2]))) === false) return false;
            $this->v[$matches[1]] = $tmp;
            return $this->v[$matches[1]];
        } elseif (preg_match('/^\s*([a-z]\w*)\s*\(\s*([a-z]\w*(?:\s*,\s*[a-z]\w*)*)\s*\)\s*=\s*(.+)$/', $expr, $matches)) {
            $fnn = $matches[1];
            if (in_array($matches[1], $this->fb))
                return $this->trigger("cannot redefine built-in function '$matches[1]()'");
            $args = explode(",", preg_replace("/\s+/", "", $matches[2]));
            if (($stack = $this->nfx($matches[3])) === false) return false;
            for ($i = 0; $i<count($stack); $i++) {
                $token = $stack[$i];
                if (preg_match('/^[a-z]\w*$/', $token) and !in_array($token, $args)) {
                    if (array_key_exists($token, $this->v)) {
                        $stack[$i] = $this->v[$token];
                    } else {
                        return $this->trigger("undefined variable '$token' in function definition");
                    }
                }
            }
            $this->f[$fnn] = array('args'=>$args, 'func'=>$stack);
            return true;
        } else 
            return $this->pfx($this->nfx($expr));
    }
    
    function vars() {
        $output = $this->v;
        unset($output['pi']);
        unset($output['e']);
        return $output;
    }
    
    function funcs() {
        $output = array();
        foreach ($this->f as $fnn=>$dat)
            $output[] = $fnn . '(' . implode(',', $dat['args']) . ')';
        return $output;
    }
    function nfx($expr) {
        $index = 0;
        $stack = new EvalMathStack;
        $output = array();
        $expr = trim(strtolower($expr));
        $ops   = array('+', '-', '*', '/', '^', '_');
        $ops_r = array('+'=>0,'-'=>0,'*'=>0,'/'=>0,'^'=>1);
        $ops_p = array('+'=>0,'-'=>0,'*'=>1,'/'=>1,'_'=>1,'^'=>2);
        $expecting_op = false;
        if (preg_match("/[^\w\s+*^\/()\.,-]/", $expr, $matches))
            return $this->trigger("illegal character '{$matches[0]}'");
        while(1) {
            $op = substr($expr, $index, 1);
            $ex = preg_match('/^([a-z]\w*\(?|\d+(?:\.\d*)?|\.\d+|\()/', substr($expr, $index), $match);
            if ($op == '-' and !$expecting_op) {
                $stack->push('_');
                $index++;
            } elseif ($op == '_') {
                return $this->trigger("illegal character '_'");
            } elseif ((in_array($op, $ops) or $ex) and $expecting_op) {
                if ($ex) {
                    $op = '*'; $index--;
                }
                while($stack->count > 0 and ($o2 = $stack->last()) and in_array($o2, $ops) and ($ops_r[$op] ? $ops_p[$op] < $ops_p[$o2] : $ops_p[$op] <= $ops_p[$o2])) {
                    $output[] = $stack->pop();
                }
                $stack->push($op);
                $index++;
                $expecting_op = false;
            } elseif ($op == ')' and $expecting_op) {
                while (($o2 = $stack->pop()) != '(') {
                    if (is_null($o2)) return $this->trigger("unexpected ')'");
                    else $output[] = $o2;
                }
               if (preg_match("/^([a-z]\w*)\($/", $stack->last(2), $matches)) {
                    $fnn = $matches[1];
                    $arg_count = $stack->pop();
                    $output[] = $stack->pop();
                    if (in_array($fnn, $this->fb)) {
                        if($arg_count > 1)
                            return $this->trigger("too many arguments ($arg_count given, 1 expected)");
                    } elseif (array_key_exists($fnn, $this->f)) {
                        if ($arg_count != count($this->f[$fnn]['args']))
                            return $this->trigger("wrong number of arguments ($arg_count given, " . count($this->f[$fnn]['args']) . " expected)");
                    } else {
                        return $this->trigger("internal error");
                    }
                }
                $index++;
            } elseif ($op == ',' and $expecting_op) {
                while (($o2 = $stack->pop()) != '(') { 
                    if (is_null($o2)) return $this->trigger("unexpected ','");
                    else $output[] = $o2;
                }
                if (!preg_match("/^([a-z]\w*)\($/", $stack->last(2), $matches))
                    return $this->trigger("unexpected ','");
                $stack->push($stack->pop()+1);
                $stack->push('(');
                $index++;
                $expecting_op = false;
            } elseif ($op == '(' and !$expecting_op) {
                $stack->push('(');
                $index++;
                $allow_neg = true;
            } elseif ($ex and !$expecting_op) {
                $expecting_op = true;
                $val = $match[1];
                if (preg_match("/^([a-z]\w*)\($/", $val, $matches)) {
                    if (in_array($matches[1], $this->fb) or array_key_exists($matches[1], $this->f)) {
                        $stack->push($val);
                        $stack->push(1);
                        $stack->push('(');
                        $expecting_op = false;
                    } else {
                        $val = $matches[1];
                        $output[] = $val;
                    }
                } else
                    $output[] = $val;
                $index += strlen($val);
            } elseif ($op == ')')
                return $this->trigger("unexpected ')'");
            elseif (in_array($op, $ops) and !$expecting_op)
                return $this->trigger("unexpected operator '$op'");
            else
                return $this->trigger("an unexpected error occured");
            if ($index == strlen($expr)) {
                if (in_array($op, $ops)) {
                    return $this->trigger("operator '$op' lacks operand");
                } else {
                    break;
                }
            }
            while (substr($expr, $index, 1) == ' ')
                $index++;                             
        } 
        while (!is_null($op = $stack->pop())) {
            if ($op == '(') return $this->trigger("expecting ')'");
            $output[] = $op;
        }
        return $output;
    }
    function pfx($tokens, $vars = array()) {
        if ($tokens == false) return false;
        $stack = new EvalMathStack;
        foreach ($tokens as $token) {
            if (in_array($token, array('+', '-', '*', '/', '^'))) {
                if (is_null($op2 = $stack->pop())) return $this->trigger("internal error");
                if (is_null($op1 = $stack->pop())) return $this->trigger("internal error");
                switch ($token) {
                    case '+':
                        $stack->push($op1+$op2); break;
                    case '-':
                        $stack->push($op1-$op2); break;
                    case '*':
                        $stack->push($op1*$op2); break;
                    case '/':
                        if ($op2 == 0) return $this->trigger("division by zero");
                        $stack->push($op1/$op2); break;
                    case '^':
                        $stack->push(pow($op1, $op2)); break;
                }
            } elseif ($token == "_") {
                $stack->push(-1*$stack->pop());
            } elseif (preg_match("/^([a-z]\w*)\($/", $token, $matches)) {
                $fnn = $matches[1];
                if (in_array($fnn, $this->fb)) {
                    if (is_null($op1 = $stack->pop())) return $this->trigger("internal error");
                    $fnn = preg_replace("/^arc/", "a", $fnn);
                    if ($fnn == 'ln') $fnn = 'log';
                    eval('$stack->push(' . $fnn . '($op1));');
                } elseif (array_key_exists($fnn, $this->f)) {
                    $args = array();
                    for ($i = count($this->f[$fnn]['args'])-1; $i >= 0; $i--) {
                        if (is_null($args[$this->f[$fnn]['args'][$i]] = $stack->pop())) return $this->trigger("internal error");
                    }
                    $stack->push($this->pfx($this->f[$fnn]['func'], $args));
                }
            } else {
                if (is_numeric($token)) {
                    $stack->push($token);
                } elseif (array_key_exists($token, $this->v)) {
                    $stack->push($this->v[$token]);
                } elseif (array_key_exists($token, $vars)) {
                    $stack->push($vars[$token]);
                } else {
                    return $this->trigger("undefined variable '$token'");
                }
            }
        }
        if ($stack->count != 1) return $this->trigger("internal error");
        return $stack->pop();
    }
    function trigger($msg) {
        $this->last_error = $msg;
        if (!$this->suppress_errors) trigger_error($msg, E_USER_WARNING);
        return false;
    }
}
class EvalMathStack {
    public $stack = array();
    public $count = 0;
    function push($val) {
        $this->stack[$this->count] = $val;
        $this->count++;
    }
    function pop() {
        if ($this->count > 0) {
            $this->count--;
            return $this->stack[$this->count];
        }
        return null;
    }
    function last($n=1) {
        return $this->stack[$this->count-$n];
    }
}
function createGraph($data,$w=400,$h=200,$prop="",$random=false){ // for legacy support, safe to remove
	return graph::createGraph($data,$w,$h,$prop,$random);
}
?>

	
Return current item: Advanced Graphing Class