php chart 类,推荐一个不错的php图形类pChart

基本上常用的图形都有了，出来的图片也还不错。不过拿来用，还是要改几个地方，主要是修改pchart类的Render方法，其默认是直接生成图片文件，将这个方法最后一行，imagepng函数第二个参数去掉，然后在这个函数前加一句：

header(“Content-type: image/png”);

这样就直接输出图片到浏览器，而不是存为文件了。

其次是中文的支持，因为其使用的默认字体库是tahoma.ttf，这个不支持中文，所以还要找个支持中文的字体，比如simhei.ttf，你的系统下字体目录里肯定有的，直接拷贝到pchart项目目录的Fonts目录里就可以了。

根据其提供的example，改写了几个图形，(thinkphp封装)供参考：

/*

饼图：3D效果

输入参数：get[datas]，逗号分隔的数据

get[labels]，逗号分隔的标题

get[title]，标题

*/

public function pie3dgram(){

$datas = explode(‘,’,$_GET[‘datas’]);

$labels = explode(‘,’,$_GET[‘labels’]);

Vendor(‘Chart.pData’);

Vendor(‘Chart.pChart’);

$DataSet = new pData;

$DataSet->AddPoint($datas,”Serie1″);

$DataSet->AddPoint($labels,”Serie2″);

$DataSet->AddAllSeries();

$DataSet->SetAbsciseLabelSerie(“Serie2”);

// Initialise the graph

$Test = new pChart(420*2,250*2);

$Test->drawFilledRoundedRectangle(7,7,413*2,243*2,5,240,240,240);

$Test->drawRoundedRectangle(5,5,415*2,245*2,5,230,230,230);

$Test->createColorGradientPalette(195,204,56,223,110,41,5);

// Draw the pie chart

$Test->setFontProperties(“Public/font/simhei.ttf”,8);

$Test->AntialiasQuality = 0;

$Test->drawPieGraph($DataSet->GetData(),$DataSet->GetDataDescription(),180*2,130*2,110*2,PIE_PERCENTAGE_LABEL,FALSE,50,20,5);

$Test->drawPieLegend(330*2,15*2,$DataSet->GetData(),$DataSet->GetDataDescription(),250,250,250);

// Write the title

$Test->setFontProperties(“Public/font/simhei.ttf”,10);

$Test->drawTitle(10*2,20*2,$_GET[‘title’],100,100,100);

$Test->Render(“”);

}

/*

矩形图：2D效果

输入参数：get[datas]，逗号分隔的数据

get[labels]，逗号分隔的标题

get[title]，标题

*/

public function histogram(){

$datas = explode(‘,’,$_GET[‘datas’]);

$labels = explode(‘,’,$_GET[‘labels’]);

Vendor(‘Chart.pData’);

Vendor(‘Chart.pChart’);

$DataSet = new pData;

foreach($datas as $k => $v){

$DataSet->AddPoint(array($v),”Serie”.($k+1));

}

$DataSet->AddAllSeries();

$DataSet->SetAbsciseLabelSerie();

foreach($datas as $k => $v){

$DataSet->SetSerieName($labels[$k],”Serie”.($k+1));

}

$Test = new pChart(700,230);

$Test->setFontProperties(“Public/font/simhei.ttf”,8);

$Test->setGraphArea(50,30,680,200);

$Test->drawFilledRoundedRectangle(7,7,693,223,5,240,240,240);

$Test->drawRoundedRectangle(5,5,695,225,5,230,230,230);

$Test->drawGraphArea(255,255,255,TRUE);

$Test->drawScale($DataSet->GetData(),$DataSet->GetDataDescription(),SCALE_NORMAL,150,150,150,TRUE,0,2,TRUE);

$Test->drawGrid(4,TRUE,230,230,230,50);

// Draw the 0 line

$Test->setFontProperties(“Public/font/simhei.ttf”,6);

$Test->drawTreshold(0,143,55,72,TRUE,TRUE);

// Draw the bar graph

$Test->drawBarGraph($DataSet->GetData(),$DataSet->GetDataDescription(),TRUE,80);

// Finish the graph

$Test->setFontProperties(“Public/font/simhei.ttf”,8);

$Test->drawLegend(570,30,$DataSet->GetDataDescription(),255,255,255);

$Test->setFontProperties(“Public/font/simhei.ttf”,10);

$Test->drawTitle(50,22,$_GET[‘title’],50,50,50,585);

$Test->Render(“”);

}

/*

线形图：

输入参数：get[datas]，逗号分隔的数据

get[labels]，逗号分隔的标题

get[title]，标题

*/

public function linegram(){

$datas = explode(‘,’,$_GET[‘datas’]);

$labels = explode(‘,’,$_GET[‘labels’]);

Vendor(‘Chart.pData’);

Vendor(‘Chart.pChart’);

$max = 0;

$min = 0;

foreach($datas as $v){

$max = max($max,$v);

$min = min($min,$v);

}

$DataSet = new pData;

$DataSet->AddPoint($datas,”Serie1″);

$DataSet->AddPoint($labels,”Serie4″);

$DataSet->AddAllSeries();

$DataSet->SetAbsciseLabelSerie(“Serie4”);

$DataSet->SetSerieName(“”,”Serie1″);

// Initialise the graph

$Test = new pChart(650,230);

$Test->reportWarnings(“GD”);

$Test->setFixedScale($min-1,$max+1,5);

$Test->setFontProperties(“Public/font/simhei.ttf”,8);

$Test->setGraphArea(65,30,570,185);

$Test->drawFilledRoundedRectangle(7,7,643,223,5,240,240,240);

$Test->drawRoundedRectangle(5,5,645,225,5,230,230,230);

$Test->drawGraphArea(255,255,255,TRUE);

$Test->drawScale($DataSet->GetData(),$DataSet->GetDataDescription(),SCALE_NORMAL,150,150,150,TRUE,0,2,TRUE,1);

$Test->drawGrid(4,TRUE,230,230,230,50);

$DataSet->RemoveSerie(“Serie4”);

$DataSet->RemoveSerie(“Serie3”);

$Test->drawLineGraph($DataSet->GetData(),$DataSet->GetDataDescription());

// Draw the line graph

$Test->setLineStyle(1,6);

$DataSet->RemoveAllSeries();

// Write values on Serie3

$Test->setFontProperties(“Public/font/simhei.ttf”,8);

$Test->writeValues($DataSet->GetData(),$DataSet->GetDataDescription(),”Serie1″);

$Test->setFontProperties(“Public/font/simhei.ttf”,10);

$Test->drawTitle(60,22,$_GET[‘title’],50,50,50,585);

$Test->Render(“”);

}