1. <?php 
2. /*******************用法************************* 
3.     $gg=new build_graph(); 
4.      
5.     $d1=array(0,62,25,20,20,100,99);  //曲线一 
6. //$d1=array('15'=>5,'16'=>8,'17'=>7,'18'=>9,'19'=>10,'20'=>15,'21'=>9); 改成这个形式啦 
7.     $d2=array(0,80,75,65,100,56,79);  //曲线二 
8.     $d3=array(0,60,50,25,12,56,45);   //曲线三 一下可以继续以此类推 
9.      
10.     $gg->add_data($d1); 
11.     $gg->add_data($d2); 
12.     $gg->add_data($d3); 
13.      
14.     $gg->set_colors("ee00ff,dd8800,00ff00"); //对应曲线的颜色 
15.      
16.     //生成曲线图 
17.     $gg->build("line",0);          //参数0表示显示所有曲线，1为显示第一条，依次类推 
18.      
19.     //生成矩形图 
20.     //$gg->build("rectangle","2");    //参数0表示显示第一个矩形，1也为显示第一条，其余依次类推 
21.      
22. /////////////////////////////////////////////////////////// 
23.     //自定义图形显示，可任意图形叠加显示 
24.        header("Content-type: image/png"); 
25.        $gg->create_cloths();          //画布 
26.        $gg->create_frame();          //画个框先 
27.        //$gg->build_rectangle(2);       //画矩形 
28.        $gg->create_line();             //画线 
29.        $gg->build_line(0);             //画曲线 
30.        imagepng($gg->image); 
31.        imagedestroy($gg->image); 
32. */ 
33. class build_graph { 
34.     var $graphwidth=300; 
35.     var $graphheight=300; 
36.     var $width_num=0;                //宽分多少等分 
37.     var $height_num=10;                //高分多少等分，默认为10 
38.     var $height_var=0;                //高度增量（用户数据平均数） 
39.     var $width_var=0;                //宽度增量（用户数据平均数） 
40.     var $height_max=0;                //最大数据值 
41.     var $array_data=array();          //用户待分析的数据的二维数组 
42.     var $array_error=array();          //收集错误信息 
43.     var $colorBg=array(255,255,255);    //图形背景-白色 
44.     var $colorGrey=array(192,192,192);    //灰色画框 
45.     var $colorBlue=array(0,0,255);       //蓝色 
46.     var $colorRed=array(255,0,0);       //红色（点） 
47.     var $colorDarkBlue=array(0,0,255);    //深色 
48.     var $colorLightBlue=array(200,200,255);       //浅色 
49.     var $array_color;                //曲线着色（存储十六进制数） 
50.     var $image;                      //我们的图像 
51.     //方法：接受用户数据 
52.     function add_data($array_user_data) 
53.     { 
54.        if(!is_array($array_user_data) or emptyempty($array_user_data)) 
55.        { 
56.           $this->array_error['add_data']="没有可供分析的数据"; 
57.           return false; 
58.           exit(); 
59.        } 
60.         
61.        $i=count($this->array_data); 
62.         
63.        $this->array_data[$i]=$array_user_data; 
64.         
65.     } 
66.     //方法：定义画布宽和长 
67.     function set_img($img_width,$img_height){ 
68.        $this->graphwidth=$img_width; 
69.        $this->graphheight=$img_height; 
70.     } 
71.     //设定Y轴的增量等分，默认为10份 
72.     function set_height_num($var_y){ 
73.        $this->height_num=$var_y; 
74.     } 
75.     //定义各图形各部分色彩 
76.     function get_RGB($color){             //得到十进制色彩 
77.     $R=($color>>16) & 0xff; 
78.     $G=($color>>8) & 0xff; 
79.     $B=($color) & 0xff; 
80.     return (array($R,$G,$B)); 
81.     } 
82.     //--------------------------------------------------------------- 
83.     #定义背景色 
84.     function set_color_bg($c1,$c2,$c3){ 
85.        $this->colorBg=array($c1,$c2,$c3); 
86.     } 
87.     #定义画框色 
88.     function set_color_Grey($c1,$c2,$c3){ 
89.        $this->colorGrey=array($c1,$c2,$c3); 
90.     } 
91.     #定义蓝色 
92.     function set_color_Blue($c1,$c2,$c3){ 
93.        $this->colorBlue=array($c1,$c2,$c3); 
94.     } 
95.     #定义色Red 
96.     function set_color_Red($c1,$c2,$c3){ 
97.        $this->colorRed=array($c1,$c2,$c3); 
98.     } 
99.     #定义深色 
100.     function set_color_DarkBlue($c1,$c2,$c3){ 
101.        $this->colorDarkBlue=array($c1,$c2,$c3); 
102.     } 
103.     #定义浅色 
104.     function set_color_LightBlue($c1,$c2,$c3){ 
105.        $this->colorLightBlue=array($c1,$c2,$c3); 
106.     } 
107.     //--------------------------------------------------------------- 
108.     //方法:由用户数据将画布分成若干等份宽 
109.     //并计算出每份多少像素 
110.     function get_width_num(){ 
111.        $this->width_num=count($this->array_data[0]); 
112.     } 
113.      
114.     function get_max_height(){ 
115.        //获得用户数据的最大值 
116.        $tmpvar=array(); 
117.            
118.        foreach($this->array_data as $tmp_value) 
119.        { 
120.           $tmpvar[]=max($tmp_value); 
121.        } 
122.         
123.        $this->height_max=max($tmpvar); 
124.         
125.        return max($tmpvar); 
126.     } 
127.      
128.     function get_height_length(){ 
129.        //计算出每格的增量长度(用户数据，而不是图形的像素值) 
130.        $max_var=$this->get_max_height(); 
131.        $max_var=round($max_var/$this->height_num); 
132.        $first_num=substr($max_var,0,1); 
133.        if(substr($max_var,1,1)){ 
134.           if(substr($max_var,1,1)>=5) 
135.              $first_num+=1; 
136.        } 
137.        for($i=1;$i<strlen($max_var);$i++){ 
138.           $first_num.="0"; 
139.        } 
140.        return (int)$first_num; 
141.     } 
142.      
143.     function get_var_wh()  //得到高和宽的增量 
144.     {           
145.        $this->get_width_num(); 
146.        //得到高度增量和宽度增量 
147.        $this->height_var=$this->get_height_length(); 
148.         
149.        $this->width_var=round($this->graphwidth/$this->width_num); 
150.     } 
151.     function set_colors($str_colors){ 
152.        //用于多条曲线的不同着色，如$str_colors="ee00ff,dd0000,cccccc" 
153.        $this->array_color=split(",",$str_colors); 
154.     } 
155. ###################################################################################################### 
156.     function build_line($var_num) 
157.     { 
158.        if(!emptyempty($var_num)) 
159.        {                   //如果用户只选择显示一条曲线 
160.           $array_tmp[0]=$this->array_data[$var_num-1]; 
161.           $this->array_data=$array_tmp; 
162.        } 
163.         
164.         //画线 
165.           
166.        for($j=0;$j<count($this->array_data);$j++) 
167.        { 
168.           list($R,$G,$B)=$this->get_RGB(hexdec($this->array_color[$j])); 
169.            
170.           $colorBlue=imagecolorallocate($this->image,$R,$G,$B); 
171.            
172.             $i=0; 
173.               foreach($this->array_data[$j] as $keys=>$values) 
174.             { 
175.                 $height_next_pix[]=round($this->array_data[$j][$keys]/$this->height_max*$this->graphheight); 
176.             } 
177.              
178.             foreach($this->array_data[$j] as $key=>$value) 
179.             { 
180.                 $height_pix=round(($this->array_data[$j][$key]/$this->height_max)*$this->graphheight); 
181.                  
182.                 if($i!=count($this->array_data[$j])-1) 
183.                 { 
184.                     imageline($this->image,$this->width_var*$i,$this->graphheight-$height_pix,$this->width_var*($i+1),$this->graphheight-$height_next_pix[$i+1],$colorBlue); 
185.                 } 
186.                  
187.                 $i++; 
188.             } 
189.           
190.         //print_r($height_next_pix); 
191.         // exit; 
192.          /* 
193.           for($i=0;$i<$this->width_num-1;$i++) 
194.           { 
195.              $height_pix=round(($this->array_data[$j][$i]/$this->height_max)*$this->graphheight); 
196.              $height_next_pix=round($this->array_data[$j][$i+1]/$this->height_max*$this->graphheight); 
197.              imageline($this->image,$this->width_var*$i,$this->graphheight-$height_pix,$this->width_var*($i+1),$this->graphheight-$height_next_pix,$colorBlue); 
198.           }*/ 
199.        } 
200.         
201.         
202.        //画点 
203.         
204.        $colorRed=imagecolorallocate($this->image, $this->colorRed[0], $this->colorRed[1], $this->colorRed[2]); 
205.        for($j=0;$j<count($this->array_data);$j++) 
206.        { 
207.                $i=0; 
208.             foreach($this->array_data[$j] as $key=>$value) 
209.             { 
210.                  $height_pix=round(($this->array_data[$j][$key]/$this->height_max)*$this->graphheight); 
211.                  imagearc($this->image,$this->width_var*$i,$this->graphheight-$height_pix,6,5,0,360,$colorRed); 
212.                  imagefilltoborder($this->image,$this->width_var*$i,$this->graphheight-$height_pix,$colorRed,$colorRed); 
213.                  $i++; 
214.             } 
215.          
216.         /* 
217.           for($i=0;$i<$this->width_num;$i++) 
218.           { 
219.              $height_pix=round(($this->array_data[$j][$i]/$this->height_max)*$this->graphheight); 
220.              imagearc($this->image,$this->width_var*$i,$this->graphheight-$height_pix,6,5,0,360,$colorRed); 
221.              imagefilltoborder($this->image,$this->width_var*$i,$this->graphheight-$height_pix,$colorRed,$colorRed); 
222.           } 
223.          */ 
224.        } 
225.         
226.     } 
227. ###################################################################################################### 
228.     function build_rectangle($select_gra){ 
229.        if(!emptyempty($select_gra)){                   //用户选择显示一个矩形 
230.           $select_gra-=1; 
231.        } 
232.        //画矩形 
233.        //配色 
234.        $colorDarkBlue=imagecolorallocate($this->image, $this->colorDarkBlue[0], $this->colorDarkBlue[1], $this->colorDarkBlue[2]); 
235.        $colorLightBlue=imagecolorallocate($this->image, $this->colorLightBlue[0], $this->colorLightBlue[1], $this->colorLightBlue[2]); 
236.        if(emptyempty($select_gra)) 
237.           $select_gra=0; 
238.        for($i=0; $i<$this->width_num; $i++){ 
239.           $height_pix=round(($this->array_data[$select_gra][$i]/$this->height_max)*$this->graphheight); 
240.           imagefilledrectangle($this->image,$this->width_var*$i,$this->graphheight-$height_pix,$this->width_var*($i+1),$this->graphheight, $colorDarkBlue); 
241.           imagefilledrectangle($this->image,($i*$this->width_var)+1,($this->graphheight-$height_pix)+1,$this->width_var*($i+1)-5,$this->graphheight-2, $colorLightBlue); 
242.        } 
243.     } 
244. ###################################################################################################### 
245.     function create_cloths(){ 
246.        //创建画布 
247.        $this->image=imagecreate($this->graphwidth+20,$this->graphheight+20); 
248.     } 
249.     function create_frame(){ 
250.        //创建画框 
251.        $this->get_var_wh(); 
252.        //配色 
253.        $colorBg=imagecolorallocate($this->image, $this->colorBg[0], $this->colorBg[1], $this->colorBg[2]); 
254.        $colorGrey=imagecolorallocate($this->image, $this->colorGrey[0], $this->colorGrey[1], $this->colorGrey[2]); 
255.        //创建图像周围的框 
256.        imageline($this->image, 0, 0, 0, $this->graphheight,$colorGrey); 
257.        imageline($this->image, 0, 0, $this->graphwidth, 0,$colorGrey); 
258.        imageline($this->image, ($this->graphwidth-1),0,($this->graphwidth-1),($this->graphheight-1),$colorGrey); 
259.        imageline($this->image, 0,($this->graphheight-1),($this->graphwidth-1),($this->graphheight-1),$colorGrey); 
260.     } 
261.      
262.     function create_line() 
263.     {//开源代码phpfensi.com 
264.        //创建网格。 
265.        $this->get_var_wh(); 
266.        $colorBg=imagecolorallocate($this->image, $this->colorBg[0], $this->colorBg[1], $this->colorBg[2]); 
267.        $colorGrey=imagecolorallocate($this->image, $this->colorGrey[0], $this->colorGrey[1], $this->colorGrey[2]); 
268.        $colorRed=imagecolorallocate($this->image, $this->colorRed[0], $this->colorRed[1], $this->colorRed[2]); 
269.         
270.        for($i=1;$i<=$this->height_num;$i++) 
271.        { 
272.           //画横线 
273.           $y1=($this->graphheight-($this->height_var/$this->height_max*$this->graphheight)*$i); 
274.            
275.           $y2=($this->graphheight-($this->height_var/$this->height_max*$this->graphheight)*$i); 
276.            
277.           imageline($this->image,0,$y1,$this->graphwidth,$y2,$colorGrey); 
278.            
279.           //标出数字 
280.           imagestring($this->image,2,0,$this->graphheight-($this->height_var/$this->height_max*$this->graphheight)*$i,$this->height_var*$i,$colorRed); 
281.        } 
282.         
283.        unset($i); 
284.         
285.        foreach($this->array_data[0] as $key=>$value) 
286.        { 
287.               //画竖线 
288.               imageline($this->image,$this->width_var*$i,0,$this->width_var*$i,$this->graphwidth,$colorGrey); 
289.            
290.           //标出数字 
291.            imagestring($this->image,2,$this->width_var*$i,$this->graphheight-15,$key,$colorRed); 
292.             
293.            $i++; 
294.        } 
295.         
296.        /* 
297.        for($i=1;$i<=$this->width_num;$i++) 
298.        { 
299.           //画竖线 
300.           imageline($this->image,$this->width_var*$i,0,$this->width_var*$i,$this->graphwidth,$colorGrey); 
301.           //标出数字 
302.           imagestring($this->image,2,$this->width_var*$i,$this->graphheight-15,$i,$colorRed); 
303.        } 
304.        */ 
305.     } 
306.     function build($graph,$str_var){ 
307.        //$graph是用户指定的图形种类,$str_var是生成哪个数据的图 
308.        header("Content-type: image/jpeg"); 
309.        $this->create_cloths();          //先要有画布啊~~ 
310.        switch ($graph){ 
311.           case "line": 
312.              $this->create_frame();          //画个框先：） 
313.              $this->create_line();          //打上底格线 
314.              $this->build_line($str_var);          //画曲线 
315.              break; 
316.           case "rectangle": 
317.              $this->create_frame();                   //画个框先：） 
318.              $this->build_rectangle($str_var);          //画矩形 
319.              $this->create_line();                   //打上底格线 
320.              break; 
321.        } 
322.        //输出图形并清除内存 
323.        imagepng($this->image); 
324.        imagedestroy($this->image); 
325.     } 
326. } 
327. ?> 
328.  

原文链接：http://www.phpfensi.com/php/20140820/4503.html