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php GD库绘制24小时柱状图的实例代码

WBOY
WBOY原创
2016-07-25 08:55:34906浏览

  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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