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我真的一直在努力解決這個問題,所以我認爲它會保證打開一個新的問題,以便從更有經驗的人那裏獲得幫助。在純PHP中創建圖表示例
我在下面的例子中合作,在純PHP創建一個非常簡單的圖表http://code.web-max.ca/image_graph.php
問題
我加入我的代碼,我評論過我的代碼有問題大部分在首都。發生在$maxv
變量設置爲0
從而導致錯誤除以零......但是當我複製和唯一的例子粘貼到我的編輯和運行它下面
的問題,這是工作,所以必須有將在我的代碼某處的邏輯問題,我藏漢附上截圖作爲我的代碼.....任何幫助非常感謝
//create array retrieved from DB in code ABOVE and add "" and , to each value
foreach($t1Picks as $key => $nr){
$values[] = '"'.$nr.'"'.',';
}
echo '$values are fine'. implode($values);
echo '<br />';
//values are fine.....go ahead
// Get the total number of columns we are going to plot
$columns = count($values);
echo 'COLUMN COUNT IS FINE'.$columns;
echo '<br />';
//columns count is fine continue
// Get the height and width of the final image
$width = 300;
$height = 200;
// Set the amount of space between each column
$padding = 5;
// Get the width of 1 column
$column_width = $width/$columns;
$column_width = round($column_width, 0);
echo 'COLUMN WIDTH IS FINE'.$column_width;
echo '<br />';
// Generate the image variables
$im = imagecreate($width,$height);
$gray = imagecolorallocate ($im,0xcc,0xcc,0xcc);
$gray_lite = imagecolorallocate ($im,0xee,0xee,0xee);
$gray_dark = imagecolorallocate ($im,0x7f,0x7f,0x7f);
$white = imagecolorallocate ($im,0xff,0xff,0xff);
// Fill in the background of the image
imagefilledrectangle($im,0,0,$width,$height,$white);
$maxv = 0; //I DONT UNDERSTAND THIS
//WHY MAX VAL 0?
// Calculate the maximum value we are going to plot
for($i=0;$i<$columns;$i++)$maxv = max($values[$i],$maxv); //WHY NO BRACE { ON FOR
echo 'MAXV TEST IS'.$maxv; //THE FIRST LOOP IS 9 AND THEN ZEROS
echo'<br />';
// Now plot each column
謝謝喲你非常喜歡閱讀!
非常感謝你,讓我檢查一下,然後我會盡快給你回覆 –
ps我只加了一部分例子,因爲我正在調試段爲段,因此沒有劃分,看看例子鏈接如果你不'不介意 –
更新:因爲改變foreach循環和內爆作爲推薦的第一個'$ maxv'值echo'ed現在是15,而不是9這是一個正確的方向步驟....但在此之後,仍然全部爲零 –