使用Chart.js和PHP动态创建图表
[英]Dynamically create chart with Chart.js and PHP
问题描述
完成支持票后，我们目前正在使用客户温度计来调查我们的客户。 不幸的是，customerthermometers小部件的外观令人作呕。 因此，我目前正在尝试使用Chart.js创建图表，并使用PHP从客户温度计的API中动态获取数据。
图表中考虑了PHP数组中的所有部分（$ dataPoints），但“数据”除外，我真的不知道如何进一步进行。
<?php
$gold = file_get_contents( 'https://app.customerthermometer.com/api.php?apiKey=<api_key>&getMethod=getNumResponsesValue&temperatureID=1' );
$green = file_get_contents( 'https://app.customerthermometer.com/api.php?apiKey=<api_key>&getMethod=getNumResponsesValue&temperatureID=2' );
$yellow = file_get_contents( 'https://app.customerthermometer.com/api.php?apiKey=<api_key>&getMethod=getNumResponsesValue&temperatureID=3' );
$red = file_get_contents( 'https://app.customerthermometer.com/api.php?apiKey=<api_key>&getMethod=getNumResponsesValue&temperatureID=4' );
$dataPoints = array(
array( "label" => "Gold Star" , "data" => $gold , "backgroundColor" => "rgba(255,215,0,1)"),
array( "label" => "Green Light" , "data" => $green , "backgroundColor" => "rgba(0,128,0,1)"),
array( "label" => "Yellow Light" , "data" => $yellow , "backgroundColor" => "rgba(255,255,0,1)"),
array( "label" => "Red Light" , "data" => $red , "backgroundColor" => "rgba(255,0,0,1)" )
);
?>
<html>
<head>
<meta charset="utf-8">
<title>Chart Test</title>
</head>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script src="../assets/chart28/dist/Chart.js"></script>
<canvas id="myChart" width="100" height="20"></canvas>
<script>
var ctx = document.getElementById('myChart');
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ['Gold Star', 'Green Light', 'Yellow Light', 'Red Light'],
datasets: <?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?>
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: true
}
}]
}
}
});
</script>
<?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?>
</body>
</html>
编辑： $dataPoints
[{"label":"Gold Star","data":4,"backgroundColor":"rgba(255,215,0,1)"},{"label":"Green Light","data":2,"backgroundColor":"rgba(0,128,0,1)"},{"label":"Yellow Light","data":0,"backgroundColor":"rgba(255,255,0,1)"},{"label":"Red Light","data":0,"backgroundColor":"rgba(255,0,0,1)"}]
我还尝试了在datasets静态设置以下值，并且可以正常工作并提供所需的结果：
datasets: [{
data: [ 4 , 2 , 0 , 0 ],
backgroundColor: [
"rgba(255,215,0,1)",
"rgba(0,128,0,1)",
"rgba(255,255,0,1)",
"rgba(255,0,0,1)"
]
}]
工作代码（感谢@Camille）：
<?php
$gold = file_get_contents( 'https://app.customerthermometer.com/api.php?apiKey=<api_key>&getMethod=getNumResponsesValue&temperatureID=1' );
$green = file_get_contents( 'https://app.customerthermometer.com/api.php?apiKey=<api_key>&getMethod=getNumResponsesValue&temperatureID=2' );
$yellow = file_get_contents( 'https://app.customerthermometer.com/api.php?apiKey=<api_key>&getMethod=getNumResponsesValue&temperatureID=3' );
$red = file_get_contents( 'https://app.customerthermometer.com/api.php?apiKey=<api_key>&getMethod=getNumResponsesValue&temperatureID=4' );
$dataPoints = array(
array( "data" => array($gold) , "label" => "Gold Star" , "backgroundColor" => "rgba(255,215,0,1)"),
array( "data" => array($green) , "label" => "Green Light" , "backgroundColor" => "rgba(0,128,0,1)"),
array( "data" => array($yellow) , "label" => "Yellow Light" , "backgroundColor" => "rgba(255,255,0,1)"),
array( "data" => array($red) , "label" => "Red Light" , "backgroundColor" => "rgba(255,0,0,1)" )
);
?>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
</head>
<body>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script src="../assets/chart28/dist/Chart.js"></script>
<canvas id="myChart" width="100" height="20"></canvas>
<script>
var ctx = document.getElementById('myChart');
var myChart = new Chart(ctx, {
type: 'bar',
data: {
labels: ['Customer Thermometer'],
datasets: <?php echo json_encode($dataPoints, JSON_NUMERIC_CHECK); ?>
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: true,
}
}]
}
}
});
</script>
</body>
</html>
1 个解决方案
解决方案1
0 已采纳 2019-06-19 08:14:37
$dataPoints数据属性应为数组。 如果获得单个值，则必须将其转换
...
$dataPoints = array(
array( "label" => "Gold Star" , "data" => array($gold) , "backgroundColor" => "rgba(255,215,0,1)"),
array( "label" => "Green Light" , "data" => array($green) , "backgroundColor" => "rgba(0,128,0,1)"),
array( "label" => "Yellow Light" , "data" => array($yellow) , "backgroundColor" => "rgba(255,255,0,1)"),
array( "label" => "Red Light" , "data" => array($red) , "backgroundColor" => "rgba(255,0,0,1)" )
);
...
如何为chart.js线图动态创建数据集？
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