时间:2021-07-01 10:21:17 帮助过:4人阅读
php中用GD绘制折线图,代码如下:
1 Class Chart{ 2 private $image; // 定义图像 3 private $title; // 定义标题 4 private $ydata; // 定义Y轴数据 5 private $xdata; // 定义X轴数据 6 private $seriesName; // 定义每个系列数据的名称 7 private $color; // 定义条形图颜色 8 private $bgcolor; // 定义图片背景颜色 9 private $width; // 定义图片的宽 10 private $height; // 定义图片的长 11 12 /* 13 * 构造函数 14 * String title 图片标题 15 * Array xdata 索引数组,X轴数据 16 * Array ydata 索引数组,数字数组,Y轴数据 17 * Array series_name 索引数组,数据系列名称 18 */ 19 function __construct($title,$xdata,$ydata,$seriesName) { 20 $this->title = $title; 21 $this->xdata = $xdata; 22 $this->ydata = $ydata; 23 $this->seriesName = $seriesName; 24 $this->color = array('#058DC7', '#50B432', '#ED561B', '#DDDF00', '#24CBE5', '#64E572', '#FF9655', '#FFF263', '#6AF9C4'); 25 } 26 27 /* 28 * 公有方法,设置条形图的颜色 29 * Array color 颜色数组,元素取值为'#058DC7'这种形式 30 */ 31 function setBarColor($color){ 32 $this->color = $color; 33 } 34 /* 35 * 绘制折线图 36 */ 37 public function paintLineChart() { 38 $ydataNum = $this->arrayNum($this->ydata); // 取得数据分组的个数 39 $max = $this->arrayMax($this->ydata); // 取得所有呈现数据的最大值 40 $max = ($max > 100)? $max : 100; 41 $multi = $max/100; // 如果最大数据是大于100的则进行缩小处理 42 $barHeightMulti = 2.2; // 条形高缩放的比例 43 $lineWidth = 50; 44 $chartLeft = (1+strlen($max))*12; // 设置图片左边的margin 45 46 $lineY = 250; // 初始化条形图的Y的坐标 47 // 设置图片的宽、高 48 //$this->width = $lineWidth*count($this->xdata) + $chartLeft - $lineWidth/1.6; 49 50 $margin = 10; // 小矩形描述右边margin 51 $recWidth = 20; // 小矩形的宽 52 $recHeight = 15; // 小矩形的高 53 $space = 20; // 小矩形与条形图的间距 54 $tmpWidth = 0; 55 // 设置图片的宽、高 56 $lineChartWidth = $lineWidth*count($this->xdata) + $chartLeft - $lineWidth/1.6 ; 57 // 两个系列数据以上的加上小矩形的宽 58 if($ydataNum > 1) { 59 $tmpWidth = $this->arrayLengthMax($this->seriesName)*10*4/3 + $space + $recWidth + + $margin; 60 } 61 $this->width = $lineChartWidth + $tmpWidth; 62 63 $this->height = 300; 64 $this->image = imagecreatetruecolor($this->width ,$this->height); // 准备画布 65 $this->bgcolor = imagecolorallocate($this->image,255,255,255); // 图片的背景颜色 66 67 // 设置条形图的颜色 68 $color = array(); 69 foreach($this->color as $col) { 70 $col = substr($col,1,strlen($col)-1); 71 $red = hexdec(substr($col,0,2)); 72 $green = hexdec(substr($col,2,2)); 73 $blue = hexdec(substr($col,4,2)); 74 $color[] = imagecolorallocate($this->image ,$red, $green, $blue); 75 } 76 77 // 设置线段的颜色、字体的颜色、字体的路径 78 $lineColor = imagecolorallocate($this->image ,0xcc,0xcc,0xcc); 79 $fontColor = imagecolorallocate($this->image, 0x95,0x8f,0x8f); 80 $fontPath = 'font/simsun.ttc'; 81 82 imagefill($this->image,0,0,$this->bgcolor); // 绘画背景 83 84 // 绘画图的分短线与左右边线 85 for($i = 0; $i < 6; $i++ ) { 86 imageline($this->image,$chartLeft-10,$lineY-$barHeightMulti*$max/5/$multi*$i,$lineChartWidth,$lineY-$barHeightMulti*$max/5/$multi*$i,$lineColor); 87 imagestring($this->image,4,5,$lineY-$barHeightMulti*$max/5/$multi*$i-8,floor($max/5*$i),$fontColor); 88 } 89 imageline($this->image,$chartLeft-10,30,$chartLeft-10,$lineY,$lineColor); 90 imageline($this->image,$lineChartWidth-1,30,$lineChartWidth-1,$lineY,$lineColor); 91 $style = array($lineColor,$lineColor,$lineColor,$lineColor,$lineColor,$this->bgcolor,$this->bgcolor,$this->bgcolor,$this->bgcolor,$this->bgcolor); 92 imagesetstyle($this->image,$style); 93 94 // 绘制折线图的分隔线(虚线) 95 foreach($this->xdata as $key => $val) { 96 $lineX = $chartLeft + 3 + $lineWidth*$key; 97 imageline($this->image,$lineX,30,$lineX,$lineY,IMG_COLOR_STYLED); 98 } 99 100 // 绘画图的折线101 foreach($this->ydata as $key => $val) {102 if($ydataNum == 1) {103 // 一个系列数据时104 if($key == count($this->ydata) - 1 ) break;105 $lineX = $chartLeft + 3 + $lineWidth*$key;106 $lineY2 = $lineY-$barHeightMulti*($this->ydata[$key+1])/$multi;107 108 // 画折线109 if($key == count($this->ydata) - 2 ) {110 imagefilledellipse($this->image,$lineX+$lineWidth,$lineY2,10,10,$color[0]);111 }112 imageline($this->image,$lineX,$lineY-$barHeightMulti*$val/$multi,$lineX+$lineWidth,$lineY2,$color[0]);113 imagefilledellipse($this->image,$lineX,$lineY-$barHeightMulti*$val/$multi,10,10,$color[0]);114 }elseif($ydataNum > 1) {115 // 多个系列的数据时116 foreach($val as $ckey => $cval) {117 118 if($ckey == count($val) - 1 ) break; 119 $lineX = $chartLeft + 3 + $lineWidth*$ckey;120 $lineY2 = $lineY-$barHeightMulti*($val[$ckey+1])/$multi;121 // 画折线122 if($ckey == count($val) - 2 ) {123 imagefilledellipse($this->image,$lineX+$lineWidth,$lineY2,10,10,$color[$key%count($this->color)]);124 }125 imageline($this->image,$lineX,$lineY-$barHeightMulti*$cval/$multi,$lineX+$lineWidth,$lineY2,$color[$key%count($this->color)]);126 imagefilledellipse($this->image,$lineX,$lineY-$barHeightMulti*$cval/$multi,10,10,$color[$key%count($this->color)]);127 }128 }129 130 }131 132 // 绘画条形图的x坐标的值133 foreach($this->xdata as $key => $val) {134 $lineX = $chartLeft + $lineWidth*$key + $lineWidth/3 - 20;135 imagettftext($this->image,10,-65,$lineX,$lineY+15,$fontColor,$fontPath,$this->xdata[$key]);136 } 137 138 // 两个系列数据以上时绘制小矩形及之后文字说明139 if($ydataNum > 1) {140 $x1 = $lineChartWidth + $space;141 $y1 = 20 ;142 foreach($this->seriesName as $key => $val) {143 imagefilledrectangle($this->image,$x1,$y1,$x1+$recWidth,$y1+$recHeight,$color[$key%count($this->color)]); 144 imagettftext($this->image,10,0,$x1+$recWidth+5,$y1+$recHeight-2,$fontColor,$fontPath,$this->seriesName[$key]);145 $y1 += $recHeight + 10; 146 }147 }148 149 // 绘画标题150 $titleStart = ($this->width - 5.5*strlen($this->title))/2;151 imagettftext($this->image,11,0,$titleStart,20,$fontColor,$fontPath,$this->title);152 153 //输出图片154 header("Content-Type:image/png");155 imagepng ( $this->image );156 }157 158 159 /*160 * 私有方法,当数组为二元数组时,统计数组的长度 161 * Array arr 要做统计的数组162 */163 private function arrayNum($arr) {164 $num = 0;165 if(is_array($arr)) {166 $num++;167 for($i = 0; $i < count($arr); $i++){168 if(is_array($arr[$i])) {169 $num = count($arr);170 break;171 }172 }173 }174 return $num;175 }176 177 /*178 * 私有方法,计算数组的深度 179 * Array arr 数组180 */181 private function arrayDepth($arr) {182 $num = 0;183 if(is_array($arr)) {184 $num++;185 for($i = 0; $i < count($arr); $i++){186 if(is_array($arr[$i])) {187 $num += $this->arrayDepth($arr[$i]);188 break;189 }190 }191 }192 return $num;193 }194 195 /*196 * 私有方法,找到一组中的最大值 197 * Array arr 数字数组198 */199 private function arrayMax($arr) {200 $depth = $this->arrayDepth($arr);201 $max = 0;202 if($depth == 1) {203 rsort($arr);204 $max = $arr[0]; 205 }elseif($depth > 1) {206 foreach($arr as $val) {207 if(is_array($val)) {208 if($this->arrayMax($val) > $max) {209 $max = $this->arrayMax($val);210 }211 }else{ 212 if($val > $max){213 $max = $val;214 }215 } 216 } 217 }218 return $max;219 }220 221 /*222 * 私有方法,求数组的平均值 223 * Array arr 数字数组224 */225 function arrayAver($arr) {226 $aver = array();227 foreach($arr as $val) {228 if(is_array($val)) {229 $aver = array_merge($aver,$val);230 }else{231 $aver[] = $val;232 }233 }234 return array_sum($aver)/count($aver);235 }236 237 /*238 * 私有方法,求数组中元素长度最大的值 239 * Array arr 字符串数组,必须是汉字240 */241 private function arrayLengthMax($arr) {242 $length = 0;243 foreach($arr as $val) {244 $length = strlen($val) > $length ? strlen($val) : $length;245 }246 return $length/3;247 } 248 249 // 析构函数250 function __destruct(){251 imagedestroy($this->image);252 }253 }
测试代码如下:
1 $xdata = array('测试一','测试二','测试三','测试四','测试五','测试六','测试七','测试八','测试九');2 $ydata = array(array(29,30,45,54,65,45,76,23,54),array(89,60,90,23,35,45,56,23,56));3 $color = array();4 $seriesName = array("七月","八月");5 $title = "测试数据";6 $Img = new Chart($title,$xdata,$ydata,$seriesName);7 $Img->paintLineChart();
效果图如下: