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javascript - Highstock 与 php 和 mysql

转载 作者:行者123 更新时间:2023-11-29 12:09:11 25 4
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我想用mysql数据库制作图表。我有两列 - 时间戳和温度。这是时间戳格式 - 2015-06-11 22:45:59 并且温度是整数。我不确定我将时间戳转换为 javascript 时间是否正确,或者可能还有其他错误。这是我的代码:

数据.php

<?
define('DBHOST','localhost');
define('DBUSER','root');
define('DBPASS','...');
define('DBNAME','diplomna2');

try {

//create PDO connection
$db = new PDO("mysql:host=".DBHOST.";port=3306;dbname=".DBNAME, DBUSER, DBPASS);
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

} catch(PDOException $e) {
//show error
echo '<p class="bg-danger">'.$e->getMessage().'</p>';
exit;
}
$stmt = $db->query('SELECT * FROM temperature');

$res=array();
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
$row['timestamp'] = strtotime($row['timestamp']);
$row['timestamp'] *=1000;

echo $res="[".$row['timestamp'] . ',' . $row['temperature'] ."]";

}
?>

这是输出:

[1434051959000,25][1434051969000,26][1434051979000,26][1434051990000,28][1434052000000,27][1434052024000,25][1434052034000,24][1434052044000,23]

html 文件:

<!DOCTYPE HTML>
<html>
<head>
<script type="text/javascript" src="js/jquery-1.7.1.min.js" ></script>
<script src="http://code.highcharts.com/stock/highstock.js"></script>
<script src="http://code.highcharts.com/stock/modules/exporting.js"></script>


<script type="text/javascript">
$(function() {
$.getJSON('data.php', function(data) {

// Create the chart
$('#container').highcharts('StockChart', {


rangeSelector : {
inputEnabled: $('#container').width() > 480,
selected : 1
},

title : {
text : 'Temperature'
},

series : [{
name : 'temperature',
data : data,
type : 'areaspline',
threshold : null,
tooltip : {
valueDecimals : 2
},
fillColor : {
linearGradient : {
x1: 0,
y1: 0,
x2: 0,
y2: 1
},
stops : [
[0, Highcharts.getOptions().colors[0]],
[1, Highcharts.Color(Highcharts.getOptions().colors[0]).setOpacity(0).get('rgba')]
]
}
}]
});
});
});
</script>
</head>
<body>

<div id="container" style="height: 400px; min-width: 310px"></div>
</body>
</html>

最佳答案

让 JavaScript 理解 PHP 数组的正确方法是 json_encode()

while 附近的代码块更改为

$res = [];

while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
$res[] = [ strtotime($row['timestamp'])*1000, $row['temperature'] ];
}

echo json_encode($res);

关于javascript - Highstock 与 php 和 mysql,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/30979344/

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