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利用php实现数据统计图 [复制链接]

so_brave

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电梯直达

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发表于 2011-03-20 14:39 |只看该作者 |倒序浏览

转：web freer

利用php实现数据统计图

年前由于工作需要，工作的中心由asp转到了php开发上，通过几周的学习与实践，已基本能熟练设计常用的web功能。b/s架构的web应用程序实现原理是一样的，不同的是脚本语法、解析方式等方面。

php在图片处理方面提供了强劲的支持。通过对php技术手册的翻阅，发现在php内置函数与GD库支持下，可以方便创建、操作各种图片，在asp下则需要如aspjpeg类的第三方组件（本人不会写组件）才能完成。而且感觉php在oo方面也很方便，于是趁热打铁写了个数据统计图类，功能与生成效果还是很简陋的那种，呵呵。下面分享给博客园的朋友，类中的WEBSITE_DIRROOT换成你的网站根目录路径，欢迎路过的大牛拍砖指导^^

001 <?php
002 /*
003 * class: 数据统计图
004 * author: 51JS.COM-ZMM
005 * date: 2011.2.1
006 * email: 304924248@qq.com
007 * blog: http://www.cnblogs.com/cnzmm/
008 */
009
010 class Draw {
011 public $mass=10, $unit=10, $data=array(), $save=false, $dir='/images/count';
012 private $width=0, $height=0, $side=0, $bgcor=array(255, 255, 255);
013 private $name, $image, $offset=0, $margin=20, $space=3, $font='/fonts/simsun.ttc';
014 private $fontW, $fontH, $fontC, $fontA, $osSum, $omSum, $xLen, $yLen, $size=9;
015
016 function __construct($width=0, $height=0, $data=array()) {
017 $this->width = $width;
018 $this->height = $height;
019 if (!empty($data)) $this->data = $data;
020
021 $this->fontW = imagefontwidth(2);
022 $this->fontH = imagefontheight(2);
023 $this->fontA = imagefontheight($this->size);
024 $this->fontA = round($this->fontA / 2) + 2;
025
026 $this->font = WEBSITE_DIRROOT.$this->font;
027 if (!is_file($this->font)) {
028 exit('字体文件不存在！');
029 } else {
030 $this->font = realpath($this->font);
031 }
032 }
033
034 public function DrawPie($name="") {
035 $this->SetImgName($name);
036
037 $this->side = $this->width;
038 if ($this->side > 0 && !empty($this->data)) {
039 $pie_core = $this->side / 2;
040
041 $fts_max = 0;
042 foreach (array_keys($this->data) as $item) {
043 $chk_itm = $item.' '.max($this->data).' 00.00%';
044 $fts_box = imagettfbbox($this->size, 0, $this->font, $chk_itm);
045 $chk_len = $fts_box[4] - $fts_box[6];
046 if ($chk_len > $fts_max) $fts_max = $chk_len;
047 } $pie_cAdd = 48 + $fts_max;
048
049 $this->image = @imagecreate($this->side + $pie_cAdd, $this->side + 1);
050 if ($this->image) {
051 $this->SetDftColor();
052
053 $dat_sum = array_sum($this->data);
054 $arc_beg = array(-180, -90, 0, 90, 180);
055 $arc_beg = $arc_beg[array_rand($arc_beg)];
056
057 $fts_add = $this->fontA * 2;
058 $ftx_beg = $this->side + 28; $fty_beg = 2;
059 $ftx_add = 20; $fty_add = 20;
060 $fts_cor = imagecolorallocate($this->image, 0, 0, 0);
061 $fty_chk = $fty_add * count($this->data);
062 while ($fty_chk > $this->side + 2) {
063 $fty_chk = --$fty_add * count($this->data);
064 }
065
066 foreach ($this->data as $item => $data) {
067 $rnd_cor = $this->GetRndColor();
068 $arc_pct = number_format($data * 100 / $dat_sum, 2);
069 $arc_end = $data * 360 / $dat_sum + $arc_beg;
070 $item = iconv('gb2312', 'UTF-8', (string)$item);
071
072 imagefilledarc($this->image, $pie_core, $pie_core, $this->side, $this->side, $arc_beg, $arc_end, $rnd_cor, IMG_ARC_PIE);
073 imagefilledrectangle($this->image, $ftx_beg, $fty_beg, $ftx_beg + 12, $fty_beg + 10, $rnd_cor);
074 imagettftext($this->image, $this->size, 0, $ftx_beg + $ftx_add, $fty_beg + $this->fontA, $fts_cor, $this->font, $item.' '.$data.' '.$arc_pct.'%');
075
076 $fty_beg += $fty_add; $arc_beg = $arc_end;
077 }
078
079 $this->Output();
080 }
081 } else {
082 exit('画布边长设置不正确或统计数据为空！');
083 }
084 }
085
086 public function DrawColumn($name="") {
087 $this->SetImgName($name);
088
089 if (!empty($this->data)) {
090 $this->DrawCdtAxes();
091 $this->DrawLattice();
092
093 $cdx_cut = count($this->data);
094 $cdx_add = floor($this->xLen / $cdx_cut);
095 $cdy_add = $this->yLen / $this->mass;
096 imagesetthickness($this->image, floor($cdx_add / 2));
097
098 $cdy_end = $this->height - $this->osSum - 1;
099 $cdx_beg = floor($cdx_add / 2) + $this->osSum;
100 foreach ($this->data as $item => $data) {
101 $cdy_beg = $this->yLen - ($data * $cdy_add / $this->unit) + $this->omSum;
102 imageline($this->image, $cdx_beg, $cdy_beg, $cdx_beg, $cdy_end, $this->GetRndColor());
103
104 $fts_txt = (string)$data;
105 $ftx_beg = $cdx_beg - $this->fontW * strlen($fts_txt) / 2;
106 $fty_beg = $cdy_beg - $this->fontH - $this->space;
107 imagestring($this->image, 2, $ftx_beg, $fty_beg, $fts_txt, $this->fontC);
108
109 $fts_txt = iconv('gb2312', 'UTF-8', (string)$item);
110 $fts_box = imagettfbbox($this->size, 0, $this->font, $fts_txt);
111 $ftx_beg = $cdx_beg - floor($fts_box[4] - $fts_box[6]) / 2;
112 $fty_beg = $this->height - $this->offset + $this->fontA;
113 imagettftext($this->image, $this->size, 0, $ftx_beg, $fty_beg, $this->fontC, $this->font, $fts_txt);
114
115 $cdx_beg += $cdx_add;
116 }
117
118 $this->Output();
119 } else {
120 exit('统计数据为空！');
121 }
122 }
123
124 public function DrawLine($name="") {
125 $this->SetImgName($name);
126
127 if (!empty($this->data)) {
128 $this->DrawCdtAxes();
129 $this->DrawLattice();
130
131 $dat_idx = 0;
132 $cd_line = imagecolorallocate($this->image, 255, 0, 0);
133 $cd_fold = imagecolorallocate($this->image, 0, 0, 255);
134
135 $cdx_cut = count($this->data) - 1;
136 $cdx_add = floor($this->xLen / $cdx_cut);
137 $cdy_add = $this->yLen / $this->mass;
138
139 $cdx_old = 0; $cdx_beg = $this->osSum;
140 $cdy_old = 0; $cdy_beg = $this->omSum - 5;
141 $cdy_end = $this->height - $this->osSum - 1;
142 foreach ($this->data as $item => $data) {
143 imagesetthickness($this->image, 1);
144 $dat_idx > 0 && imageline($this->image, $cdx_beg, $cdy_beg, $cdx_beg, $cdy_end, IMG_COLOR_STYLED);
145 imagesetthickness($this->image, 2);
146
147 $cdx_dot = $cdx_beg;
148 $cdy_dot = $this->yLen - $data * $cdy_add / $this->unit + $this->omSum;
149 if ($cdx_old > 0 && $cdy_old > 0) {
150 imageline($this->image, $cdx_old, $cdy_old, $cdx_dot, $cdy_dot, $cd_line);
151 imagefilledellipse($this->image, $cdx_old, $cdy_old, 6, 6, $cd_fold);
152 }
153 imagefilledellipse($this->image, $cdx_dot, $cdy_dot, 6, 6, $cd_fold);
154
155 $fts_txt = '('.(string)$data.')';
156 if ($dat_idx == 0) {
157 $ftx_beg = $cdx_dot + $this->space + 3;
158 $fty_beg = $cdy_dot - $this->fontH / 2;
159 } else {
160 $ftx_beg = $cdx_dot - $this->fontW * strlen($fts_txt) / 2;
161 $fty_beg = $cdy_dot - $this->fontH - $this->space * 2;
162 }
163 imagestring($this->image, 2, $ftx_beg, $fty_beg, $fts_txt, $this->fontC);
164
165 $fts_txt = iconv('gb2312', 'UTF-8', (string)$item);
166 $fts_box = imagettfbbox($this->size, 0, $this->font, $fts_txt);
167 $ftx_beg = $cdx_beg - floor($fts_box[4] - $fts_box[6]) / 2;
168 $fty_beg = $this->height - $this->offset + $this->fontA;
169 imagettftext($this->image, $this->size, 0, $ftx_beg, $fty_beg, $this->fontC, $this->font, $fts_txt);
170
171 $dat_idx ++; $cdx_beg += $cdx_add;
172 $cdx_old = $cdx_dot; $cdy_old = $cdy_dot;
173 }
174
175 $this->Output();
176 } else {
177 exit('统计数据为空！');
178 }
179 }
180
181 public function GetImgName() {
182 return empty($this->name) ? null :
183 WEBSITE_DIRROOT.$this->dir.'/'.$this->name;
184 }
185
186 public function SetImgName($name) {
187 if (!empty($name)) {
188 $this->save = true; $this->name = $name;
189 }
190 }
191
192 public function ImportData($data=array()) {
193 empty($data) || is_array($data) && $this->data = $data;
194 }
195
196 private function GetMinSize() {
197 $fts_len = strlen((string)$this->unit) + 1;
198 $this->offset = imagefontwidth(2) * $fts_len;
199 $this->osSum = $this->offset + $this->space;
200 $this->omSum = $this->offset + $this->margin;
201 $this->xLen = $this->width - $this->osSum - $this->omSum;
202 $this->yLen = $this->height - $this->osSum - $this->omSum;
203
204 return $this->osSum + $this->omSum;
205 }
206
207 private function DrawCdtAxes() {
208 $min_size = $this->GetMinSize();
209 if ($this->width > $min_size && $this->height > $min_size) {
210 $this->image = @imagecreate($this->width, $this->height);
211 if ($this->image) {
212 $this->SetDftColor();
213
214 $cd_cr = imagecolorallocate($this->image, 0, 0, 0);
215 $cd_xs = $this->osSum; $cd_xe = $this->width - $this->offset;
216 $cd_ys = $this->offset; $cd_ye = $this->height - $this->osSum;
217
218 imageline($this->image, $cd_xs, $cd_ye, $cd_xe, $cd_ye, $cd_cr);
219 imageline($this->image, $cd_xs, $cd_ys, $cd_xs, $cd_ye, $cd_cr);
220 imageline($this->image, $cd_xe, $cd_ye, $cd_xe - 6, $cd_ye - 3, $cd_cr);
221 imageline($this->image, $cd_xe, $cd_ye, $cd_xe - 6, $cd_ye + 3, $cd_cr);
222 imageline($this->image, $cd_xs, $cd_ys, $cd_xs - 3, $cd_ys + 6, $cd_cr);
223 imageline($this->image, $cd_xs, $cd_ys, $cd_xs + 3, $cd_ys + 6, $cd_cr);
224 } else {
225 exit('画布建立失败！');
226 }
227 } else {
228 exit('画布尺寸设置不正确！');
229 }
230 }
231
232 private function DrawLattice() {
233 $this->SetDashLine();
234
235 $cdy_each = $this->unit;
236 $cdy_yMax = $this->mass * $cdy_each;
237 while ($cdy_yMax < max($this->data)) {
238 $cdy_each += $this->unit;
239 $cdy_yMax = $cdy_each * $this->mass;
240 } $this->unit = $cdy_each;
241 $cdx_beg = $this->osSum + 1;
242 $cdx_end = $this->width - $this->omSum;
243 $cdy_add = $this->yLen / $this->mass;
244
245 $cdy_beg = $this->omSum;
246 for ($i = 0; $i < $this->mass; $i ++) {
247 imageline($this->image, $cdx_beg, $cdy_beg, $cdx_end, $cdy_beg, IMG_COLOR_STYLED);
248
249 $fts_txt = (string)$this->unit * ($this->mass - $i);
250 $ftx_beg = $cdx_beg - $this->fontW * strlen($fts_txt) - $this->space;
251 $fty_beg = $cdy_beg - $this->fontH / 2;
252 imagestring($this->image, 2, $ftx_beg, $fty_beg, $fts_txt, $this->fontC);
253
254 $cdy_beg += $cdy_add;
255 }
256 }
257
258 private function SetDftColor() {
259 imagecolorallocate($this->image, $this->bgcor[0], $this->bgcor[1], $this->bgcor[2]);
260 }
261
262 private function GetRndColor() {
263 return imagecolorallocate($this->image, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
264 }
265
266 private function SetDashLine() {
267 $cd_stop = imagecolorallocate($this->image, 255, 255, 255);
268 $cd_dash = imagecolorallocate($this->image, 200, 200, 200);
269 imagesetstyle($this->image, array($cd_stop, $cd_stop, $cd_stop,
270 $cd_dash, $cd_dash, $cd_dash));
271 $this->fontC = imagecolorallocate($this->image, 56, 56, 56);
272 }
273
274 private function Output() {
275 extract($this->GetImgSupot(), EXTR_OVERWRITE);
276
277 if ($this->save == false) {
278 header('Content-Type: '.$type);
279 $func($this->image);
280 } else {
281 if (empty($this->name)) {
282 $this->name = array_keys($this->data);
283 $this->name = md5(implode('', $this->name));
284 }
285 $this->dir = WEBSITE_DIRROOT.$this->dir;
286 $this->name = $this->name.'.'.$ext;
287 $func($this->image, $this->dir.'/'.$this->name);
288 }
289 }
290
291 private function GetImgSupot() {
292 $img_supt = imagetypes();
293 if (($img_supt & IMG_GIF) && function_exists('imagegif'))
294 return array('type'=>'image/gif', 'ext'=>'gif', 'func'=>'imagegif');
295 if (($img_supt & IMG_JPG) && function_exists('imagejpeg'))
296 return array('type'=>'image/jpeg', 'ext'=>'jpg', 'func'=>'imagejpeg');
297 if (($img_supt & IMG_PNG) && function_exists('imagepng'))
298 return array('type'=>'image/png', 'ext'=>'png', 'func'=>'imagepng');
299 }
300
301 function __destruct() {
302 image_destroy($this->image);
303 }
304 }
305
306 // 使用方法
307 $w = 640; $h = 480;
308 $info = array('春季'=>78, '夏季'=>65, '秋季'=>86, '冬季'=>55);
309 $draw_ins = new Draw($w, $h);
310 $draw_ins->ImportData($info);
311 // 柱状图
312 $draw_ins->DrawColumn();
313 // 线形图
314 // $draw_ins->DrawLine();
315 // 饼形图
316 // $draw_ins->DrawPie();
317 unset($draw_ins);

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