php生成图形（Libchart）实例

<?
 /*
  update by Leo
  It’s draw the pic of Sheet,and it will take all the num on the pic.
 */
 require “./libchart/classes/libchart.php”;
 class drawPic{
  var $chart;
  var $style;
  function drawPic($style=”1″,$width=”500″,$height=”250″){
   $this->style=$style;
   if($style==1){
    //cylinder
    $this->chart = new VerticalBarChart($width,$height);
   }else if($style==2){
    //line
    $this->chart = new LineChart($width,$height);
   }else if($style==3){
    //Lump
    $this->chart = new PieChart($width,$height);
   }else{
    //cross
    $this->chart=new HorizontalBarChart($width,$height);
   }
  }

  function draw($obj){

   if($this->style==1||$this->style==”1″){
    //cylinder
    $dataSet = new XYDataSet() ;
    $this->chart->setTitle($obj->title);//title
    $arr=array();
    $arr=$obj->dataArray;
    foreach($arr as $key => $val){
     $dataSet->addPoint ( new Point($key,$val)) ;
    }
    $this->chart->setDataSet ( $dataSet ) ;
    $this->chart->render();
   }else if($this->style==2||$this->style==”2″){
    //line
    $this->chart->setTitle($obj->title);//title
    $arr=array();
    $arr=$obj->dataArray;
    $i=0;
    $dataSet = new XYSeriesDataSet();
    foreach($arr as $key => $val){
     $serie{$i}= new XYDataSet();
     foreach($val as $k => $v){
      $serie{$i}->addPoint(new Point($k,$v));
     }
     $dataSet->addSerie($key,$serie{$i});
     $i=$i+1;
    }
    $this->chart->setDataSet($dataSet);
    $this->chart->render();
   }else if($style==3){
    //Lump
    $dataSet = new XYDataSet() ;
    $this->chart->setTitle($obj->title);//title
    $arr=array();
    $arr=$obj->dataArray;
    foreach($arr as $key => $val){
     $dataSet->addPoint ( new Point($key.”($val)”,$val)) ;
    }
    $this->chart->setDataSet ( $dataSet ) ;
    $this->chart->render();
   }else{
    //cross
    $dataSet = new XYDataSet();
    $this->chart->setTitle($obj->title);//title
    $arr=array();
    $arr=$obj->dataArray;
    foreach($arr as $key => $val){
     $dataSet->addPoint ( new Point($key,$val)) ;
    }
    $this->chart->setDataSet($dataSet);
    $this->chart->render();
   }
  }

 }
 class kkk{};
 $n=new drawPic(“4”);//it will set 1 or 2 or 3 or 4
 $k=new kkk();
 $k->dataArray=array(“2000″=>”30″,”2001″=>”40″,”2002″=>”50″,”2003″=>”60″,”2004″=>”70″,”2005″=>”80″,”20020″=>”90”);//style==1 or style=2 or style=4
 //$k->dataArray=array(“2000″=>”30″,”2001″=>”40″,”2002″=>”50″,”2003″=>”60″,”2004″=>”70″,”2005″=>”80″,”20020″=>”90”);//style==3
 //$k->dataArray=array(“yi”=>array(“2000″=>”30″,”2001″=>”40″,”2002″=>”50″,”2004″=>”60”),”er”=>array(“2003″=>”60″,”2004″=>”70″,”2005″=>”80″,”20020″=>”90”),”san”=>array(“33″=>”12″,”45″=>”56″,”89″=>”45″,”86″=>”49”));//style==2 and the years will show first array to block.(it will be show 2000 2001 2002 2004)
 $k->title=”The Sheet title”;
 $n->draw($k);
?>
 

<?php
   header(“content-type:image/png”); 
   require_once(‘libchart/classes/libchart.php’);

   $chart = new VerticalBarChart( 500 , 250 ) ; // 参数表示需要创建的图像的宽和高
   $dataSet = new XYDataSet() ; // 实例化一个 XY 轴数据对象

     // 为这个对象增加四组数据集合， Point 对象的第一个参数表示 X 轴坐标，
// 第二个表示 Y 轴坐标
   $str = ‘二月’;

$str = mb_convert_encoding($str, “html-entities”,”utf-8″ );

$dataSet -> addPoint ( new Point( “Jan 2005” , 273 )) ;
    $dataSet -> addPoint ( new Point( “$str” , 120 )) ;
    $dataSet -> addPoint ( new Point( “March 2005” , 442 )) ;
    $dataSet -> addPoint ( new Point( “April 2005” , 600 )) ;
     // 把这个数据集合传递给图形对象
    $chart -> setDataSet ( $dataSet ) ;
    // 设置图形的标题，并把它作为一个 png 文件渲染
    $chart -> setTitle ( “统计图” ) ;

    //$chart -> render ( “demo/generated/demo1.png-600” ) ;
    // 这里需要一个路径和文件名称
    //就这么简单一个像下图一样美丽的柱状图就出来了
    $chart 来源gaodai$ma#com搞$代*码网-> render () ;
?>