PHP statistical graphics LIbchart class usage example_PHP tutorial
WBOYOriginal
2016-07-13 10:47:13846browse
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
<🎜> 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" );
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
Copy code
$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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