PHP statistical graphics LIbchart class usage example

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PHP statistical graphics LIbchart class usage example_PHP tutorial

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Jul 13, 2016 am 10:47 AM

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Statistical graphs are data graphs that we often see. If three arrays are displayed graphically or real estate is displayed graphically, we will use graphs. Let me introduce a php LIbchart graph generation class, which is very useful. Friends in need can refer to it.

For simple full numbers or English, you can directly use the following class (you can download the libchart class from Baidu)

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);

The red fonts are calls. Methods 1, 2, and 4 are the same array. 3 is a linear graph, there may be two lines or multiple lines for comparison (it can also be a single line).

If you want to use Chinese, you may find that the Chinese characters in libchart are garbled. Here is a solution

Our application main source code is as follows:

The code is as follows

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 () ;

Copy code

header("content-type:image/png"); require_once('libchart/classes/libchart.php'); $chart = new VerticalBarChart(500, 250); //The parameters represent the width and height of the image to be created $dataSet = new XYDataSet(); // Instantiate an XY axis data object //Add four sets of data sets to this object. The first parameter of the Point object represents the X-axis coordinate, // The second one represents the Y-axis coordinate $str = 'February'; $str = mb_convert_encoding($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 )) ; // Pass this data collection to the graphics object $chart -> setDataSet ( $dataSet ) ; // Set the title of the graphic and render it as a png file $chart -> setTitle ("Statistical Chart"); //$chart -> render ( "demo/generated/demo1.png" ) ; //This requires a path and file name //It’s that simple and a beautiful histogram like the picture below comes out $chart -> render () ; ?>

The places marked in red are to solve the problem of Chinese garbled characters.

2. Garbled title:

The default display of Chinese characters is garbled. This is due to encoding. Make the following modifications:
First, change libchar/libchart/classes/view/chart/Chart.php and find the following content:

The code is as follows

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

Copy code

public function setTitle($title) {

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);

}

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

}

changed to:

The code is as follows

Copy code

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";

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

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"; }

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

}

The third step: It is what is mentioned in a blog above: 1. The php file that I wrote using the Libchart library to generate the chart is saved in utf-8 encoding 2. Find several Chinese font libraries, such as Chinese Xingkai, Songti, etc., and copy them to the libchart fonts directory 3. Modify the text.php file in the libchart classes directory Lines 47 and 48

The code is as follows

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$this->fontCondensed = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed.ttf"; $this->fontCondensedBold = dirname(__FILE__) . "/../fonts/DejaVuSansCondensed-Bold.ttf"; changed to $this->fontCondensed = dirname(__FILE__) . "/../fonts/The Chinese font you found"; $this->fontCondensedBold = dirname(__FILE__) . "/../fonts/The Chinese font you found"; What I modified:

The code is as follows

Copy code

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 This file is the FANGZHENG FANGSONG simplified font I found. I changed the Chinese name to look like that. In fact, it’s okay not to change it. Mainly the basic operations, and then if you have any questions, follow the instructions above and it should be fine. Thank you again to the enthusiastic netizens who provided these methods. Please share more!

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