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php统计图形LIbchart类使用实例

WBOY
WBOYOriginal
2016-06-13 09:49:461174browse

统计图形就我们会常到的数据图形了,如果三个数组以图形显示或楼盘以图形走向我们都会要用到图形,下面我来介绍一个php LIbchart图形生成类吧,很用的有需要的朋友可参考。

简单全数字或英文的就可以直接使用下面类了(libchart类大家可自行百度下载)

 代码如下 复制代码

 /*
  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);

?>

红色字体为调用。方法1,2,4为相同的数组。3为线性图,有可能有两条线或者多条线的比较(也可以单线)。

如果要使用中文可能会发现libchart中文乱码 了,下面找了一个办法


我们的应用主源代码如下:

 代码如下 复制代码

   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" ) ;
    // 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 -> render () ; 

?>

标红字的地方是为了解决中文乱码的。

2、标题乱码:

默认显示中文是乱码,这是由于编码的原因,做如下修改:
首先,更改libchar/libchart/classes/view/chart/Chart.php,找到如下内容:

 代码如下 复制代码
public function setTitle($title) {          
            $this->plot->setTitle($title);
        }

更改为:

 代码如下 复制代码

public function setTitle($title) {
        $title = mb_convert_encoding($title, "html-entities","utf-8" );

           $this->plot->setTitle($title);

}

第三步:就是上面某个博客里讲到的:

1、自己写的使用Libchart 库生成图表的php 文件以utf-8编码保存
       2、找几个中文字体库,比如华文行楷、宋体等等,复制到libchart fonts目录下
        3、修改libchart classes目录下的text.php 文件
第47、48行

 

 代码如下 复制代码

$this->fontCondensed = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed.ttf";
$this->fontCondensedBold = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed-Bold.ttf";

改为


$this->fontCondensed = dirname(__FILE__) . "/../fonts/你找来的中文字体";
$this->fontCondensedBold = dirname(__FILE__) . "/../fonts/你找来的中文字体";


我修改的:

 代码如下 复制代码

public function Text() {
    $baseDir = dirname(__FILE__) . "/../../../";
 
    // Free low-res fonts based on Bitstream Vera
   $this->fontCondensed = $baseDir . "fonts/FANGZHENGFANGSONG.ttf";
    $this->fontCondensedBold = $baseDir . "fonts/FANGZHENGFANGSONG.ttf";
   }

FANGZHENGFANGSONG.ttf 这个文件是我找的方正仿宋简体字库,我把中文名字改成那个样子了,其实不改也是可以的。

主要是基本操作,然后又疑问的地方,按照上面说的做了,应该就是已经可以了,再次谢谢提供这些方法的热心网友,大家多多交流呀!

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