php GD库绘制24小时柱状图的实例代码

3. /*

4. 24小时柱状图
5. 作者:taokey
6. QQ:29611705
7. * 编辑：bbs.it-home.org
8. */

9. function h24($str){

10. $hour = explode(",",$str);
11. $hmax = max($hour);
12. $ppix = 150/$hmax;

13. //计算柱状图高度

14. $h0 = 190-$hour[0]*$ppix;
15. $h1 = 190-$hour[1]*$ppix;
16. $h2 = 190-$hour[2]*$ppix;
17. $h3 = 190-$hour[3]*$ppix;
18. $h4 = 190-$hour[4]*$ppix;
19. $h5 = 190-$hour[5]*$ppix;
20. $h6 = 190-$hour[6]*$ppix;
21. $h7 = 190-$hour[7]*$ppix;
22. $h8 = 190-$hour[8]*$ppix;
23. $h9 = 190-$hour[9]*$ppix;
24. $h10 = 190-$hour[10]*$ppix;
25. $h11 = 190-$hour[11]*$ppix;
26. $h12 = 190-$hour[12]*$ppix;
27. $h13 = 190-$hour[13]*$ppix;
28. $h14 = 190-$hour[14]*$ppix;
29. $h15 = 190-$hour[15]*$ppix;
30. $h16 = 190-$hour[16]*$ppix;
31. $h17 = 190-$hour[17]*$ppix;
32. $h18 = 190-$hour[18]*$ppix;
33. $h19 = 190-$hour[19]*$ppix;
34. $h20 = 190-$hour[20]*$ppix;
35. $h21 = 190-$hour[21]*$ppix;
36. $h22 = 190-$hour[22]*$ppix;
37. $h23 = 190-$hour[23]*$ppix;

38. //创建一个img

39. $img = imagecreate(755,210);
40. //背景
41. $bgc = imagecolorallocate ($img, 245, 250, 254);
42. //黑色
43. $bc = imagecolorallocate($img,0,0,0);
44. //画竖轴
45. imageline($img,15,30,15,189, $bc);
46. //画横轴
47. imageline($img,15,190,750,190, $bc);

48. //画竖轴点

49. for($i=39,$j=10;$i imageline($img,13,$i,15,$i, $bc);
50. imagestring($img,1,1,$i-4,$j."x", $bc);
51. }

52. //画横轴点

53. $t = true;
54. for($i=31,$j=29;$i if($t){
55. $x=$i;
56. $t=false;
57. }else{
58. $x=$i+1;
59. $t=true;
60. }
61. imageline($img,$x,190,$x,192, $bc);
62. }
63. //竖轴标记
64. $x = ceil($hmax/10);
65. imagestring($img,2,10,15,"X=".$x,$bc);
66. //竖轴标记

67. //0点

68. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
69. imagefilledrectangle($img,31,$h0,45,189,$color);
70. imagestring($img,1,31,$h0-10,$hour[0],$color);
71. imagechar($img,1,36,195,0,$bc);

72. //1点

73. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
74. imagefilledrectangle($img,61,$h1,75,189,$color);
75. imagestring($img,1,61,$h1-10,$hour[1],$color);
76. imagechar($img,1,66,195,1,$bc);

77. //2点

78. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
79. imagefilledrectangle($img,91,$h2,105,189,$color);
80. imagestring($img,1,91,$h2-10,$hour[2],$color);
81. imagechar($img,1,96,195,2,$bc);

82. //3点

83. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
84. imagefilledrectangle($img,121,$h3,135,189,$color);
85. imagestring($img,1,121,$h3-10,$hour[3],$color);
86. imagechar($img,1,126,195,3,$bc);

87. //4点

88. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
89. imagefilledrectangle($img,151,$h4,165,189,$color);
90. imagestring($img,1,151,$h4-10,$hour[4],$color);
91. imagechar($img,1,156,195,4,$bc);

92. //5点

93. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
94. imagefilledrectangle($img,181,$h5,195,189,$color);
95. imagestring($img,1,181,$h5-10,$hour[5],$color);
96. imagechar($img,1,186,195,5,$bc);

97. //6点

98. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
99. imagefilledrectangle($img,211,$h6,225,189,$color);
100. imagestring($img,1,211,$h6-10,$hour[6],$color);
101. imagechar($img,1,216,195,6,$bc);

102. //7点

103. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
104. imagefilledrectangle($img,241,$h7,255,189,$color);
105. imagestring($img,1,241,$h7-10,$hour[7],$color);
106. imagechar($img,1,246,195,7,$bc);

107. //8点

108. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
109. imagefilledrectangle($img,271,$h8,285,189,$color);
110. imagestring($img,1,271,$h8-10,$hour[8],$color);
111. imagechar($img,1,276,195,8,$bc);

112. //9点

113. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
114. imagefilledrectangle($img,301,$h9,315,189,$color);
115. imagestring($img,1,301,$h9-10,$hour[9],$color);
116. imagechar($img,1,306,195,9,$bc);

117. //10点

118. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
119. imagefilledrectangle($img,331,$h10,345,189,$color);
120. imagestring($img,1,331,$h10-10,$hour[10],$color);
121. imagestring($img,1,334,195,10,$bc);

122. //11点

123. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
124. imagefilledrectangle($img,361,$h11,375,189,$color);
125. imagestring($img,1,361,$h11-10,$hour[11],$color);
126. imagestring($img,1,364,195,11,$bc);

127. //12点

128. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
129. imagefilledrectangle($img,391,$h12,405,189,$color);
130. imagestring($img,1,391,$h12-10,$hour[12],$color);
131. imagestring($img,1,394,195,12,$bc);

132. //13点

133. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
134. imagefilledrectangle($img,421,$h13,435,189,$color);
135. imagestring($img,1,421,$h13-10,$hour[13],$color);
136. imagestring($img,1,424,195,13,$bc);

137. //14点

138. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
139. imagefilledrectangle($img,451,$h14,465,189,$color);
140. imagestring($img,1,451,$h14-10,$hour[14],$color);
141. imagestring($img,1,454,195,14,$bc);

142. //15点

143. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
144. imagefilledrectangle($img,481,$h15,495,189,$color);
145. imagestring($img,1,481,$h15-10,$hour[15],$color);
146. imagestring($img,1,481,195,15,$bc);

147. //16点

148. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
149. imagefilledrectangle($img,511,$h16,525,189,$color);
150. imagestring($img,1,511,$h16-10,$hour[16],$color);
151. imagestring($img,1,511,195,16,$bc);

152. //17点

153. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
154. imagefilledrectangle($img,541,$h17,555,189,$color);
155. imagestring($img,1,541,$h17-10,$hour[17],$color);
156. imagestring($img,1,544,195,17,$bc);

157. //18点

158. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
159. imagefilledrectangle($img,571,$h18,585,189,$color);
160. imagestring($img,1,571,$h18-10,$hour[18],$color);
161. imagestring($img,1,571,195,18,$bc);

162. //19点

163. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
164. imagefilledrectangle($img,601,$h19,615,189,$color);
165. imagestring($img,1,601,$h19-10,$hour[19],$color);
166. imagestring($img,1,604,195,19,$bc);

167. //20点

168. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
169. imagefilledrectangle($img,631,$h20,645,189,$color);
170. imagestring($img,1,631,$h20-10,$hour[20],$color);
171. imagestring($img,1,634,195,20,$bc);

172. //21点

173. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
174. imagefilledrectangle($img,661,$h21,675,189,$color);
175. imagestring($img,1,661,$h21-10,$hour[21],$color);
176. imagestring($img,1,664,195,21,$bc);

177. //22点

178. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
179. imagefilledrectangle($img,691,$h22,705,189,$color);
180. imagestring($img,1,691,$h22-10,$hour[22],$color);
181. imagestring($img,1,694,195,22,$bc);

182. //23点

183. $color = imagecolorallocate($img, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));
184. imagefilledrectangle($img,721,$h23,735,189,$color);
185. imagestring($img,1,721,$h23-10,$hour[23],$color);
186. imagestring($img,1,724,195,23,$bc);

187. //加个边框 加了之后不好看

188. //imagerectangle($img, 0, 0, 754, 209, $bc);

189. imagepng($img);

190. imagedestroy($img);
191. }
192. $str = isset($_GET['str'])?$_GET['str']:"";
193. if($str){
194. h24($str);
195. }
196. ?>

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