欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  后端开发

PHP轻量级图表类PHP Light Chart:PLChart

程序员文章站 2024-01-22 19:35:04
...
该类可以生成饼状图(2D/3D),柱状图(2D/3D),以及折线图,可控制输出至浏览器或文件,控制输出的jpeg图像的质量。
所有的设置工作只有5个函数:
1。图表背景色设置setbgcolor()
2。图表参数设置setchartdata()
2。图表标题设置settitle()
3。图表注释设置setdesc()
4。图表图形设置setgraphics()

详细的设置参数请参考文档注释或是后面的测试页面demo.php

 array(192, 192, 192), "darkgray" => array(144, 144, 144), "lightred" => array(255, 0, 0), "darkred" => array(128, 0, 0), "lightgreen" => array(0, 255, 0), "darkgreen" => array(0, 80, 0), "lightblue" => array(0, 0, 255), "darkblue" => array(0, 0, 80), "lightyellow" => array(255, 255, 0), "darkyellow" => array(200, 200, 50), "lightcyan" => array(0, 255, 255), "darkcyan" => array(0, 90, 90),                ); // ============================ 设置函数 - setting functions ============================ /* * @todo 设置图像背景色 - set the backgroundcolor of the chart image * * @param int $red * @param int $green * @param int $blue * */function setbgcolor($red = 0, $green = 0, $blue = 0) {  $this->bgcolor[0] = $red;  $this->bgcolor[1] = $green;  $this->bgcolor[2] = $blue; } /* * @todo 设置图像参数 - set the parameters of the chart image * * @param string $type * @param int $d3d * @param int $width * @param int $height * @param int $quality * @param array $data * @param string $savefile * */function setchartdata($type = "pie", $d3d = 1, $width = 400, $height = 400, $quality = 70, $data = array(), $savefile = '') {  $this->type = $type;     // 图表类型 - type of the chart : pie, column, line  $this->d3d = $d3d;     // 3D效果 -  $this->width = $width;     // 图表宽度  $this->height = $height;     // 图表高度  $this->quality = $quality;     // 图表显示质量  $this->param = $data;     // 源数据数组  $this->savefile = $savefile;     // 保存文件路径 } /* * @todo 设置图像标题 - set the title of the chart * * @param string $tstring * @param float $tfontsize * @param float $tangle * @param int $tposx * @param int $tposy * @param string $tfontfile * @param int $tfred * @param int $tfgreen * @param int $tfblue * */function settitle($tstring = '', $tfontsize = 20, $tangle = 0, $tposx = 10, $tposy = 20, $tfontfile = 'c:/windows/fonts/simhei.ttf', $tfred = 0, $tfgreen = 0, $tfblue = 0) {  $this->title = array($tfontsize, $tangle, $tposx, $tposy, $tfontfile, $tstring, $tfred, $tfgreen, $tfblue); } /* * @todo 设置图像注释 - set the decsription of the chart * * @param int $dposx * @param int $dposy * @param int $dwidth * @param int $dheight * @param int $dmargin * @param int $dsize * @param int $dangle * @param string $dfontfile * @param int $dfred * @param int $dfgreen * @param int $dfblue * */function setdesc($dposx = 0, $dposy = 0, $dwidth = 100, $dheight = 300, $dmargin = 10, $dsize = 10, $dangle = 0, $dfontfile = 'c:/windows/fonts/simhei.ttf', $dfred = 0, $dfgreen = 0, $dfblue = 0) {  $this->desc = array($dposx, $dposy, $dwidth, $dheight, $dmargin, $dsize, $dangle, $dfontfile, $dfred, $dfgreen, $dfblue); } /* * @todo 设置图形 - set the graphics of the chart * * @param int $gstartx * @param int $gstarty * @param int $gwidth * @param int $gheight * @param int $gmargin * @param float $shadow * */function setgraphics($gstartx = 0, $gstarty = 0, $gwidth = 100, $gheight = 100, $gmargin = 10, $shadow = 0.1) {  $this->graphics = array($gstartx, $gstarty, $gwidth, $gheight, $gmargin, $shadow); } // ============================ 生成函数 - build functions ============================ /* * @todo 生成图表实例 - build chart object * */ function buildchart()     {  // 图像头信息 - header of the image file  header("Content-type: image/jpeg");  // 建立图像 - create image  $this->chart = imagecreatetruecolor($this->width, $this->height);  // 填充背景色 - set backgroundcolor  $bgc = imagecolorallocate($this->chart, $this->bgcolor[0], $this->bgcolor[1], $this->bgcolor[2]);         imagefill($this->chart, 0, 0, $bgc);  // 定义颜色 - allocate colors in the graphics  foreach($this->colordefine as $key => $value)      {            $$key = imagecolorallocate($this->chart, $value[0], $value[1], $value[2]);  array_push($this->colors, $$key);    // 颜色变量入栈 - add color variables into array      } } /* * @todo 生成图表标题 - build title of the chart * */ function buildtitle()     {  // 设置标题颜色 - set title color  $titlecolor = imagecolorallocate($this->chart, $this->title[6], $this->title[7], $this->title[8]);  // 写标题 - write title    imagettftext($this->chart, $this->title[0], $this->title[1], $this->title[2], $this->title[3], $titlecolor, $this->title[4], $this->title[5]); } /* * @todo 生成图表说明 - build description of the chart * */ function builddesc()     {  // 注释位置变量 - image position variables  $dposx = $this->desc[0];  $dposy = $this->desc[1];     // 注释起始坐标 - the start position of the description  $w = $this->desc[2];     // 注释部分宽度 - width of all description  $h = $this->desc[3];     // 注释部分高度 - height of all description  $num = count($this->param);     // 注释数量 - number of description lines  $perh = round($h / $num);      // 每行注释的平均高度 - height of each description line  $margin = $this->desc[4];     // 注释的间距 - margin between square and font  $dsize = $this->desc[5];     // 注释的字体大小 - font size of description  $dangle = $this->desc[6];     // 注释的字体角度 - font display angle of description  $dfontfile = $this->desc[7];     // 注释的字体文件 - font file of description  $dfcolor = imagecolorallocate($this->chart, $this->desc[8], $this->desc[9], $this->desc[10]);     // 注释的字体颜色 - font color of description    // 写注释 - write description  $dstring = array_keys($this->param);  for($i = 0; $i chart, $dposx, $dposy, $dposx + $dsize, $dposy + $dsize, $this->colors[$i * 2]);  // 写文字 - write string      imagettftext($this->chart, $dsize, $dangle, $dposx + $dsize + $margin, $dposy + $dsize, $dfcolor, $dfontfile, $dstring[$i] . " - " . $this->param[$dstring[$i]]);  // 下移 - move down to write next description  $dposy += $perh;    }     } /* * @todo 生成图形 - build graphics of the chart * * @param source $chart * @param int $d3d * @param array $param * @param array $colordefine * */ function buildgraphics()     {  // 定义生成图形函数 - define make graphics function   // ==================== 饼状图 - pie ====================  if($this->type == "pie")   {    // 取得图形位置 - get the positoin of the graphics  $posx = $this->graphics[0];  $posy = $this->graphics[1];  // 取得图形宽度和高度 - get width and height of the graphics  $w = $this->graphics[2];  $h = $this->graphics[3];  // 图形边距 - graphics margin  $margin = $this->graphics[4];  // 3D阴影高度对于椭圆高度的比例 - percent of 3D effect shadow height as the height of the ellipse  $shadow = $this->graphics[5];  // 图形位置变量 - image position variables  $centerx = round($posx + $w / 2 + $margin);  $centery = round($posy + $h / 2 + $margin);     // 椭圆中心坐标 - the center of the ellipse           // 数据处理 - data process  $total = array_sum($this->param);     // 取得总数 - get total  $percent = array(0);     // 保存比例 - save each percent  $temp = 0;  foreach($this->param as $v)           {  $temp += 360 * ($v / $total);  array_push($percent, $temp);     // 保存角度 - save angle           }  // 生成饼状图 - make pie chart     // 生成3D饼状图 - make 3D pie chart  if($this->d3d == 1)               {  // 3D阴影 - make 3D shadow  for ($j = ($centery * (1 + $shadow)); $j > $centery; $j--)                    {  for ($k = 0; $k chart, $centerx, $j, $w, $h, $percent[$k], $percent[$k + 1], $this->colors[$k * 2 + 1], IMG_ARC_NOFILL);                }                     }              }  // 生成平面饼状图 - make 2D pie chart  for ($i = 0; $i chart, $centerx, $centery, $w, $h, $percent[$i], $percent[$i + 1], $this->colors[$i * 2], IMG_ARC_PIE);        }   }  // ==================== 柱状图 - column ====================  elseif($this->type == "column")   {  // 取得图形位置 - get the positoin of the graphics  $posx = $this->graphics[0];  $posy = $this->graphics[1];  // 取得图形宽度和高度 - get width and height of the graphics  $w = $this->graphics[2];  $h = $this->graphics[3];  // 图形边距 - graphics margin  $margin = $this->graphics[4];  // 3D阴影高度对于柱体宽度的比例 - percent of 3D effect shadow height as the width of the column  $shadow = $this->graphics[5];  // 图形位置变量 - image position variables  $startx = round($posx + $margin);  $starty = round($posy + $h - $margin);     // 图形左下角坐标 - the left-bottom position of the graphics           // 数据处理 - data process  $maxvalue = max($this->param);    // 取得最大值 - get max value  $num = count($this->param);     // 取得条柱个数 - get number of columns  $multiple = floor(log10($maxvalue));     // 取得数值区间 - get data field  $field = floor($maxvalue / pow(10, $multiple)) + 1;     // 区间数 - number of unit fields  $fieldnumber = $field > 5 ? $field : 5;     // 数据区域数量 - number of data fields  $topvalue = $field * pow(10, $multiple);     // 图表最高点数值 - value of the top  $unitx = ($w - $margin * 2) / $num;     // 取得x单位长度 - get x unit length  $unity = ($h - $margin * 2) / $fieldnumber;     // 取得y单位长度 - get y unit length  $shadowheight = $unitx / 2 * $shadow;     // 阴影宽度 - shadow height     // 初始化坐标系 - initialize reference frame  if($this->d3d == 1)     // 3D效果 - 3D effect     {            imagefilledpolygon($this->chart, array($startx, $starty, $startx + $shadowheight, $starty - $shadowheight, $startx + $shadowheight, $posy - $shadowheight, $startx, $posy), 4, $this->colors[0]);            imageline($this->chart, $startx + $shadowheight, $starty - $shadowheight, $startx + $shadowheight, $posy - $shadowheight, $this->colors[1]);           }     imageline($this->chart, $startx, $starty, $posx + $w, $starty, $this->colors[1]);     // x     imageline($this->chart, $startx, $starty, $startx, $posy, $this->colors[1]);     // y     // 区间标识 - declare fields  for($i = 0; $i d3d == 1)             {              imageline($this->chart, $startx, $starty - $unity * $i, $startx + $shadowheight, $starty - $unity * $i - $shadowheight, $this->colors[1]);        imageline($this->chart, $startx + $shadowheight, $starty - $unity * $i - $shadowheight, $posx + $w + $shadowheight, $starty - $unity * $i - $shadowheight, $this->colors[1]);       }  // 2D - 2D  else      {                    imageline($this->chart, $startx, $starty - $unity * $i, $posx + $w, $starty - $unity * $i, $this->colors[0]);             }  // 区间说明 - field description             imagettftext($this->chart, $this->desc[5], $this->desc[6], $posx, $starty - $unity * $i, $this->colors[0], $this->desc[7], $topvalue / $fieldnumber * $i);         }  // 生成条柱 - make columns  $paramkeys = array_keys($this->param);  for($j = 0; $j param[$paramkeys[$j]] / $topvalue);     // 条柱高度 - column height  $columnx = $startx + $unitx / 4 + $unitx * $j;     // 条柱起点x坐标 - x coordinate of column               imagefilledrectangle($this->chart, $columnx, $starty - $columnheight, $columnx + $unitx / 2, $starty - 1, $this->colors[$j * 2]);     // 画条柱 - draw columns      // 3D效果 - 3D effect  if($this->d3d == 1)            {  // 轮廓线 - contour line                   imagerectangle($this->chart, $columnx, $starty - $columnheight, $columnx + $unitx / 2, $starty - 1, $this->colors[$j * 2 + 1]);  // 3D表面 - 3D top          imagefilledpolygon($this->chart, array($columnx, $starty - $columnheight, $columnx + $unitx / 2, $starty - $columnheight, $columnx + $unitx / 2 + $shadowheight, $starty - $columnheight - $shadowheight, $columnx + $shadowheight, $starty - $columnheight - $shadowheight), 4, $this->colors[$j * 2]);          imagepolygon($this->chart, array($columnx, $starty - $columnheight, $columnx + $unitx / 2, $starty - $columnheight, $columnx + $unitx / 2 + $shadowheight, $starty - $columnheight - $shadowheight, $columnx + $shadowheight, $starty - $columnheight - $shadowheight), 4, $this->colors[$j * 2 + 1]);  // 3D阴影 - 3D shadow          imagefilledpolygon($this->chart, array($columnx + $unitx / 2, $starty, $columnx + $unitx / 2 + $shadowheight, $starty - $shadowheight, $columnx + $unitx / 2 + $shadowheight, $starty - $columnheight - $shadowheight, $columnx + $unitx / 2, $starty - $columnheight), 4, $this->colors[$j * 2 + 1]);          imagepolygon($this->chart, array($columnx + $unitx / 2, $starty, $columnx + $unitx / 2 + $shadowheight, $starty - $shadowheight, $columnx + $unitx / 2 + $shadowheight, $starty - $columnheight - $shadowheight, $columnx + $unitx / 2, $starty - $columnheight), 4, $this->colors[$j * 2 + 1]);            }           }   }  // ==================== 曲线图 - line ====================  else  {  // 取得图形位置 - get the positoin of the graphics  $posx = $this->graphics[0];  $posy = $this->graphics[1];  // 取得图形宽度和高度 - get width and height of the graphics  $w = $this->graphics[2];  $h = $this->graphics[3];  // 图形边距 - graphics margin  $margin = $this->graphics[4];  // 每个点的直径 - diameter of each point  $pointsize = $this->graphics[5] * 20;  // 图形位置变量 - image position variables  $startx = round($posx + $margin);  $starty = round($posy + $h - $margin);     // 图形左下角坐标 - the left-bottom position of the graphics           // 数据处理 - data process  $maxvalue = max($this->param);    // 取得最大值 - get max value  $minvalue = min($this->param);    // 取得最小值 - get min value  $num = count($this->param);     // 取得点个数 - get number of points  $fieldnumber = $num;     // 数据区域数量 - number of data fields  $fielddata = $maxvalue - $minvalue;     // 取得数据区间 - get data field  $unitdata = $fielddata / $fieldnumber;     // 取得单位区间数值 - get unit field data value  $unitx = ($w - $margin * 2) / $num;     // 取得x单位长度 - get x unit length  $unity = ($h - $margin * 2) / $fieldnumber;     // 取得y单位长度 - get y unit length     // 初始化坐标系 - initialize reference frame     imageline($this->chart, $startx, $starty, $posx + $w, $starty, $this->colors[1]);     // x     imageline($this->chart, $startx, $starty, $startx, $posy, $this->colors[1]);     // y     // 区间标识 - declare fields  for($i = 0; $i chart, $startx, $starty - $unity * $i, $posx + $w, $starty - $unity * $i, $this->colors[0]);        // 区间说明 - field description             imagettftext($this->chart, $this->desc[5], $this->desc[6], $posx, $starty - $unity * $i, $this->colors[0], $this->desc[7], $minvalue + $unitdata * $i);         }  // 生成线条 - make line  $paramkeys = array_keys($this->param);  $loca = array();     // 保存轨迹的数组 - array to save locas  for($i = 0; $i param[$paramkeys[$i]] - $minvalue) / $fielddata);  // 坐标数据入栈 - push coordinates into array  $loca[$i * 2] = $pointx;  $loca[$i * 2 + 1] = $pointy;  // 画点 - draw point      imagefilledellipse($this->chart, $pointx, $pointy, $pointsize, $pointsize, $this->colors[$i * 2]);           }  $linecolor = imagecolorallocate($this->chart, $this->title[6], $this->title[7], $this->title[8]);     // 定义线条颜色 - define line color  for($i = 0; $i chart, $loca[$i], $loca[$i + 1], $loca[$i + 2], $loca[$i + 3], $linecolor);  $i += 2;     }   }     } /* * @todo 输出图像至浏览器或文件 - output the chart image to browser or file */ function outputchart() {  // 建立图标 - build chart  $this->buildchart();  // 写入图形 - build graphics  $this->buildgraphics();  // 写入注释 - build description  $this->builddesc();  // 写入标题 - build title  $this->buildtitle();  // 输出图像 - flush image         imagejpeg($this->chart, $this->savefile, $this->quality);         imagedestroy($this->chart);     } } ?>


*********************************************************************************

演示文件demo.php:
**********************************************************************************

 20, "2月份:16%" => 23, "3月份:19%" => 27, "4月份:13%" => 18, "5月份:18%" => 24, "6月份:12%" => 25); // 实例化 $chart = new plchart(); // 设置背景色 // 三个参数为0-255 $chart->setbgcolor(255,255,255);     // 设置标题文字 $title = setchartdata("line", 0, 800, 600, 100, $data); // 设置标题 /* * 第一个参数为标题的字符串 * 第二个参数为标题字体大小 * 第三个参数为标题倾斜角度 * 第四个参数为标题位于图表的起始横坐标 * 第五个参数为标题文字的基准纵坐标 * 第六个参数为标题字体文件 * 最后三个参数为标题字体的RGB颜色 */$chart->settitle($title, 20, 0, 10, 20, 'c:/windows/fonts/simhei.ttf', 0, 0, 0); // 设置注释 /* * 第一个参数为注释位于图表的起始横坐标 * 第二个参数为注释位于图表的起始纵坐标 * 第三个参数为注释部分的宽度 * 第四个参数为注释部分的高度 * 第五个参数为注释内容与注释部分边框的间距 * 第六个参数为注释字体大小 * 第七个参数为注释字体倾斜角度 * 第六个参数为注释字体文件 * 最后三个参数为注释字体的RGB颜色 */$chart->setdesc(500, 100, 200, 300, 10, 18, 0, 'c:/windows/fonts/simhei.ttf', 0, 0, 0); // 设置图形 /* * 第一个参数为图形部分位于整个图表的左上角横坐标 * 第二个参数为图形部分位于整个图表的左上角纵坐标 * 第三个参数为图形部分的宽度 * 第四个参数为图形部分的高度 * 第五个参数为图形与图形部分边框的间距(纵坐标标记的宽度) * 第六个参数为3D阴影的相对比例或是轨迹图中圆点的直径 */$chart->setgraphics(10, 100, 500, 500, 50, 0.3); // 输出图表 $chart->outputchart();     // 销毁实例 unset($chart); ?>