我正在尝试从MySQL数据库生成谷歌图表。我对这篇文章进行了评论：PHP MySQL Google Chart JSON - Complete Example
我做了帖子中提到的所有内容，但在网页上提到了这一点：
＆＃39;每周任务＆＃39;，＆＃39;键入＆＃39; =＆GT; ＆＃39; string＆＃39;），数组（＆＃39;标签＆＃39; =＆gt;＆＃39;百分比＆＃39;，＆＃39;类型＆＃39; =＆gt;＆＃39;数字＆＃39; ;））; $ rows = array（）; while（$ r = mysql_fetch_assoc（$ sth））{$ temp = array（）; //以下行将用于切割饼图$ temp [] = array（＆＃39; v＆＃39; =＆gt;（字符串）$ r [＆＃39; Weekly_task＆＃39;]）; //每个切片的值$ temp [] = array（＆＃39; v＆＃39; =＆gt;（int）$ r [＆＃39; percentage＆＃39;]）; $ rows [] = array（＆＃39; c＆＃39; =＆gt; $ temp）; } $ table [＆＃39; rows＆＃39;] = $ rows; $ jsonTable = json_encode（$ table）; // echo $ jsonTable; ？＆GT;
我尝试并检查了我的数据库，似乎一切都很好。
代码：
<html>
<head>
<!--Load the Ajax API-->
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script type="text/javascript">
// Load the Visualization API and the piechart package.
google.load('visualization', '1', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(drawChart);
function drawChart() {
// Create our data table out of JSON data loaded from server.
var data = new google.visualization.DataTable(<?=$jsonTable?>);
var options = {
title: 'My Weekly Plan',
is3D: 'true',
width: 800,
height: 600
};
// Instantiate and draw our chart, passing in some options.
// Do not forget to check your div ID
var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
</head>
<body>
<?php
$con=mysql_connect("localhost","root","password") or die("Failed to connect with database!!!!");
mysql_select_db("googlecharts", $con);
// The Chart table contains two fields: weekly_task and percentage
// This example will display a pie chart. If you need other charts such as a Bar chart, you will need to modify the code a little to make it work with bar chart and other charts
$sth = mysql_query("SELECT weekly_task, percentage FROM chart");
/*
---------------------------
example data: Table (Chart)
--------------------------
weekly_task percentage
Sleep 30
Watching Movie 40
work 44
*/
$rows = array();
//flag is not needed
$flag = true;
$table = array();
$table['cols'] = array(
// Labels for your chart, these represent the column titles
// Note that one column is in "string" format and another one is in "number" format as pie chart only required "numbers" for calculating percentage and string will be used for column title
array('label' => 'Weekly Task', 'type' => 'string'),
array('label' => 'Percentage', 'type' => 'number')
);
$rows = array();
while($r = mysql_fetch_assoc($sth)) {
$temp = array();
// the following line will be used to slice the Pie chart
$temp[] = array('v' => (string) $r['Weekly_task']);
// Values of each slice
$temp[] = array('v' => (int) $r['percentage']);
$rows[] = array('c' => $temp);
}
$table['rows'] = $rows;
$jsonTable = json_encode($table);
//echo $jsonTable;
?>
<!--this is the div that will hold the pie chart-->
<div id="chart_div"></div>
</body>
</html>
更新 我将HTML和PHP代码分成不同的文件。 现在我得到空白的网页。 码： PHP：
<?php
$con=mysql_connect("localhost","root","pass") or die("Failed to connect with database!!!!");
mysql_select_db("googlechart", $con);
// The Chart table contains two fields: weekly_task and percentage
// This example will display a pie chart. If you need other charts such as a Bar chart, you will need to modify the code a little to make it work with bar chart and other charts
$sth = mysql_query("SELECT weekly_task, percentage FROM chart");
/*
---------------------------
example data: Table (Chart)
--------------------------
weekly_task percentage
Sleep 30
Watching Movie 40
work 44
*/
$rows = array();
//flag is not needed
$flag = true;
$table = array();
$table['cols'] = array(
// Labels for your chart, these represent the column titles
// Note that one column is in "string" format and another one is in "number" format as pie chart only required "numbers" for calculating percentage and string will be used for column title
array('label' => 'Weekly Task', 'type' => 'string'),
array('label' => 'Percentage', 'type' => 'number')
);
$rows = array();
while($r = mysql_fetch_assoc($sth)) {
$temp = array();
// the following line will be used to slice the Pie chart
$temp[] = array('v' => (string) $r['Weekly_task']);
// Values of each slice
$temp[] = array('v' => (int) $r['percentage']);
$rows[] = array('c' => $temp);
}
$table['rows'] = $rows;
$jsonTable = json_encode($table);
//echo $jsonTable;
?>
HTML：
<?php
include('new.php');
ini_set('display_errors', 1);
error_reporting(E_ALL);
?>
<html>
<head>
<!--Load the Ajax API-->
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js"></script>
<script type="text/javascript">
// Load the Visualization API and the piechart package.
google.load('visualization', '1', {'packages':['corechart']});
// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(drawChart);
function drawChart() {
// Create our data table out of JSON data loaded from server.
var data = new google.visualization.DataTable(<?=$jsonTable?>);
var options = {
title: 'No. of Kills',
is3D: 'true',
width: 800,
height: 600
};
// Instantiate and draw our chart, passing in some options.
// Do not forget to check your div ID
var chart = new google.visualization.PieChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
</head>
<body>
<!--this is the div that will hold the pie chart-->
<div id="chart_div"></div>
</body>
</html>
答案 0 :(得分：1)
有几件事需要调整。我会尝试逐条列出它们。
mysql_个函数换成至少mysqli_个函数。$jsonTable是否提供了正确的数据 - 您需要自己对此进行评估。在执行上述更正时，请务必检查代码是否存在服务器端错误。
如果没有服务器端错误，但未显示图形，则：
DateTable()函数包含$jsonTable变量中的正确/实际数据字符串。如果您仍然被困，希望了解更多信息，或希望查看类似的工作示例，请转到here。