Use the bar chart implemented by GD in PHP, and use phpgd to implement the bar chart _ PHP Tutorial

Use the column chart implemented by GD in PHP and phpgd to implement the column chart. In PHP, the column chart implemented by GD is used, and in phpgd is used to implement the column chart implemented by GD in PHP. you can write a class to draw the column chart and use the code on it. 1? Php2ClassChart {3 private $ ima PHP uses the column chart implemented by GD, and phpgd implements the column chart.

In PHP, we use the column chart implemented by GD to write a class to draw a column chart and use the code above.

1
 Title = $ title; 20 $ this-> xdata = $ xdata; 21 $ this-> ydata = $ ydata; 22 $ this-> color = array ('#058DC7 ', '#50B432', '# ED561B', '# DDDF00', '#24CBE5', '#64E572', '# ff9655',' # fff263 ', '#6AF9C4'); 23} 24 25/* 26 * public method, set the bar chart color 27 * Array color Array, the element value is '# 058dc7' in this format 28 */29 function setBarColor ($ color) {30 $ this-> color = $ color; 31} 32 33/* 34 * public method, bar chart 35 */36 function mkBarChart () {37 $ ydata Num = $ this-> arrayNum ($ this-> ydata); // get the number of data groups 38 $ max = $ this-> arrayMax ($ this-> ydata ); // get the maximum value of all rendered data 39 $ multi = ($ max> 100 )? $ Max/100: 1; // if the maximum data size is greater than 100, compress the data and obtain 40 $ barHeightMulti = 2.2; // the ratio of bar height scaling is 41 $ barWidth = (16-2 * ($ ydataNum-1)> 10? (16-2 * ($ ydataNum-1): 10; // The bar width is 42 $ barSpace = 16; // the spacing between the entries is 43 $ chartLeft = (1 + strlen ($ max) * 12; // Set margin 44 45 $ barY = 250 on the left of the image; // initialize Y coordinate 46 of the bar chart // set the width and height of the image to 47 $ this-> width = ($ ydataNum * $ barWidth + $ barSpace) * count ($ this-> xdata) + $ chartLeft; 48 $ this-> height = 300; 49 $ this-> image = imagecreatetruecolor ($ this-> width, $ this-> height); // prepare the canvas 50 $ this-> bgcolor = imagecolorallocate ($ thi S-> image, 255,255,255); // The background color of the image 51 52 // set the bar chart color 53 $ color = array (); 54 foreach ($ this-> color as $ col) {55 $ col = substr ($ col, 1, strlen ($ col)-1 ); 56 $ red = hexdec (substr ($ col,); 57 $ green = hexdec (substr ($ col )); 58 $ blue = hexdec (substr ($ col, 4, 2); 59 $ color [] = imagecolorallocate ($ this-> image, $ red, $ green, $ blue ); 60} 61 62 // set the line segment color, font color, and font path 63 $ lineColor = imagecolorallocate ($ t His-> image, 0xcc, 0xcc, 0xcc); 64 $ fontColor = imagecolorallocate ($ this-> image, 0x95, 0x8f, 0x8f ); 65 $ fontPath = 'font/simsun. ttc '; 66 67 imagefill ($ this-> image, 0, 0, $ this-> bgcolor ); // painting background 68 69 // the short-term and left-side edges of the painting graph 70 for ($ I = 0; $ I <6; $ I ++) {71 imageline ($ this-> image, $ chartLeft-10, $ barY-$ barHeightMulti * $ max/5/$ multi * $ I, $ this-> width, $ barY-$ barHeightMulti * $ max/5/$ multi * $ I, $ lineColor); 72 imagestring ($ This-> image, $ barY-$ barHeightMulti * $ max/5/$ multi * $ I-8, floor ($ max/5 * $ I), $ fontColor ); 73} 74 imageline ($ this-> image, $ chartLeft-10, 30, $ chartLeft-10, $ barY, $ lineColor); 75 imageline ($ this-> image, $ this-> width-1, 30, $ this-> width-1, $ barY, $ lineColor ); 76 77 // The 78 foreach ($ this-> ydata as $ key => $ val) {79 if ($ ydataNum = 1) {80 // 81 $ barX = $ chartLeft + 3 + ($ barWidth + $ barSpace) * $ key; 82 imagefilledrectangle ($ this-> image, $ barX, $ barY-$ barHeightMulti * $ val/$ multi, $ barX + $ barWidth, $ barY, $ color [$ key % count ($ this-> color)]); 83} elseif ($ ydataNum> 1) {84 // when data of multiple generations is 85 $ cbarSpace = $ barSpace + $ barWidth * ($ ydataNum-1); 86 foreach ($ val as $ ckey => $ cval) {87 $ barX = $ chartLeft + 3 + $ barWidth * $ key + $ ckey * ($ cbarSpace + $ barWidth); 88 imagefilledrectangle ($ this-> image, $ barX, $ barY-$ barHeigh TMulti * $ cval/$ multi, $ barX + $ barWidth, $ barY, $ color [$ key % count ($ this-> color)]); 89} 90} 91 92} 93 94 // the x coordinate value of the bar chart is 95 foreach ($ this-> xdata as $ key => $ val) {96 $ barX = $ chartLeft + ($ ydataNum * $ barWidth + $ barSpace) * $ key + $ ydataNum * $ barWidth/3; 97 imagettftext ($ this-> image, 10,-45, $ barX, $ barY + 15, $ fontColor, $ fontPath, $ this-> xdata [$ key]); 98} 99 100 // painting title 101 $ titleStart = ($ this-> width-5.5 * strle N ($ this-> title)/2; 102 imagettftext ($ this-> image, 11, 0, $ titleStart, 20, $ fontColor, $ fontPath, $ this-> title); 103 104 // output image 105 header ("Content-Type: image/png"); 106 imagepng ($ this-> image ); 107} 108 109/* 110 * Private method. when the array is a binary array, the length of the statistical Array is 111 * Array arr. the Array to be counted is 112 */113 private function arrayNum ($ arr) {114 $ num = 0; 115 if (is_array ($ arr )) {116 $ num ++; 117 for ($ I = 0; $ I <count ($ arr); $ I ++) {118 if (is_array ($ Arr [$ I]) {119 $ num = count ($ arr); 120 break; 121} 122} 123} 124 return $ num; 125} 126 127/* 128 * private method, calculate the depth of the Array 129 * Array arr Array 130 */131 private function arrayDepth ($ arr) {132 $ num = 0; 133 if (is_array ($ arr) {134 $ num ++; 135 for ($ I = 0; $ I <count ($ arr); $ I ++) {136 if (is_array ($ arr [$ I]) {137 $ num + = $ this-> arrayDepth ($ arr [$ I]); 138 break; 139} 140} 141} 142 return $ num; 143} 144 145/* 146 * Private method, find a group Maximum value 147 * Array arr numeric Array 148 */149 private function arrayMax ($ arr) {150 $ depth = $ this-> arrayDepth ($ arr); 151 $ max = 0; 152 if ($ depth = 1) {153 rsort ($ arr); 154 $ max = $ arr [0]; 155} elseif ($ depth> 1) {156 foreach ($ arr as $ val) {157 if (is_array ($ val) {158 if ($ this-> arrayMax ($ val)> $ max) {159 $ max = $ this-> arrayMax ($ val); 160} 161} else {162 if ($ val >$ max) {163 $ max = $ val; 164} 165} 166} 167} 168 Return $ max; 169} 170 171 function arrayAver ($ arr) {172 $ aver = array (); 173 foreach ($ arr as $ val) {174 if (is_array ($ val) {175 $ aver = array_merge ($ aver, $ val); 176} else {177 $ aver [] = $ val; 178} 179} 180 return array_sum ($ aver)/count ($ aver); 181 182} 183 // destructor 184 function _ destruct () {185 imagedestroy ($ this-> image); 186} 187} 188?>

This class can be used to draw a series of column charts and multiple series of column charts, as shown below:

Column charts of a series

Column charts of multiple series

Using the column chart implemented by GD in PHP, you can write a class to draw a column chart and use the code above. 1? Php 2 Class Chart {3 private $ ima...