我正在处理来自 MySQL 的图表，它作为折线图工作得很好，但是当我更改为注释图时，由于它需要日期/时间，它给了我以下错误，我将类型更改为日期时间(是字符串)并且仍然有错误。
Type mismatch. Value 2014-07-23 19:03:16 does not match type datetime
原始代码
<?php
$con=mysql_connect("ip","user","pass") or die("Failed to connect with database!!!!");
mysql_select_db("db", $con);
$sth = mysql_query("SELECT * FROM db.table");
$data = array (
'cols' => array(
array('id' => 'date', 'label' => 'date', 'type' => 'datetime'),
array('id' => 'Temp', 'label' => 'Temp', 'type' => 'number'),
array('id' => 'Humid', 'label' => 'Humid', 'type' => 'number')
),
'rows' => array()
);
while ($res = mysql_fetch_assoc($sth))
// array nesting is complex owing to to google charts api
array_push($data['rows'], array('c' => array(
array('v' => $res['TIME']),
array('v' => $res['TEMP']),
array('v' => $res['HUMID'])
)));
?>
<html>
<head>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load('visualization', '1.1', {'packages':['annotationchart']});
google.setOnLoadCallback(drawChart);
function drawChart() {
var bar_chart_data = new google.visualization.DataTable(<?php echo json_encode($data); ?>);
var options = {
title: 'Weather Station'
};
var chart = new google.visualization.AnnotationChart(document.getElementById('chart_div'));
chart.draw(bar_chart_data, options);
}
</script>
</head>
<body>
<div id="chart_div" style="width: 900px; height: 500px;"></div>
</body>
</html>
最佳答案
“日期时间”数据类型需要非常特定的数据输入语法。使用 JSON 时，数据应构造为以下格式的字符串:'Date(year, month, day, hours, minutes, seconds, milliseconds)'，其中 month 之后的所有选项 是可选的(默认为 1 for day 和 0 for all others)并且 month 为零-索引(所以一月是 0 而不是 1)。
您可以像这样转换日期时间:
while ($res = mysql_fetch_assoc($sth)) {
// assumes dates are patterned 'yyyy-MM-dd hh:mm:ss'
preg_match('/(\d{4})-(\d{2})-(\d{2})\s(\d{2}):(\d{2}):(\d{2})/', $res['TIME'], $match);
$year = (int) $match[1];
$month = (int) $match[2] - 1; // convert to zero-index to match javascript's dates
$day = (int) $match[3];
$hours = (int) $match[4];
$minutes = (int) $match[5];
$seconds = (int) $match[6];
array_push($data['rows'], array('c' => array(
array('v' => "Date($year, $month, $day, $hours, $minutes, $seconds)"),
array('v' => $res['TEMP']),
array('v' => $res['HUMID'])
)));
}
关于javascript - Google Chart 中的 MySQL 日期时间，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/24929767/