Php 使用MYSQL中的数据动态填充Google折线图
我的最终目标是得到一个图形,显示多个折线图(取决于当前的年数),所有月份显示在X轴上,数量显示在Y轴上。这是我见过的最接近我想要实现的目标: 上图显示了我想要实现的目标。如前所述,X轴上的月份与Y轴上的金额相同。然后“值”将是查询返回的年份,即每年都有自己的折线图 这是返回json的php位的值:Php 使用MYSQL中的数据动态填充Google折线图,php,mysql,json,google-visualization,Php,Mysql,Json,Google Visualization,我的最终目标是得到一个图形,显示多个折线图(取决于当前的年数),所有月份显示在X轴上,数量显示在Y轴上。这是我见过的最接近我想要实现的目标: 上图显示了我想要实现的目标。如前所述,X轴上的月份与Y轴上的金额相同。然后“值”将是查询返回的年份,即每年都有自己的折线图 这是返回json的php位的值: <?php $results = array('cols' => array (array('label' => 'Date', 'type' => date'),
<?php
$results = array('cols' => array (array('label' => 'Date', 'type' => date'),
array('label' => 'Amount', 'type' => 'number')
),
'rows' => array()
);
$query = $db->prepare('SELECT * FROM Claims GROUP BY EXTRACT(MONTH FROM ClaimDate ) , EXTRACT( YEAR FROM ClaimDate ) ');
$query->execute();
$rows1 = $query->fetchAll(PDO::FETCH_ASSOC);
foreach($rows1 as $row)
{
$ClaimDate = DateTime::createFromFormat('Y-m-d H:i:s', $row['ClaimDate'])->format('Y-m-d');
$dateArr = explode('-', $ClaimDate);
$year = (int) $dateArr[0];
$month = (int) $dateArr[1] - 1;
$day = (int) $dateArr[2];
$results['rows'][] = array('c' => array(array('v' => "Date($year, $month, $day)"), array('v' => $row['amount'])
));
}
$json = json_encode($results, JSON_NUMERIC_CHECK);
// print_r($json);exit;
?>
最后,这是呈现图表的函数:
<script type="text/javascript">
google.load("visualization", "1", { packages: ["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart()
{
var data = new google.visualization.DataTable(<?php echo json_encode($json); ?>);
var chart = new google.visualization.LineChart(document.getElementById('line_chart'));
chart.draw(data, {width: 400, height: 240});
}
</script>
<div id="line_chart"></div>
load(“可视化”、“1”、{packages:[“corechart”]});
setOnLoadCallback(drawChart);
函数绘图图()
{
var data=new google.visualization.DataTable();
var chart=new google.visualization.LineChart(document.getElementById('line_chart');
绘制图表(数据,{宽度:400,高度:240});
}
所有这些的输出如下所示:
如上所示,我距离实现我想要的目标还有相当长的距离。我被困在这个问题上,任何帮助都将不胜感激
编辑
根据Ram Kannan Raj的回答,我在查询中添加了按索赔日期排序的ASC,而折线图看起来确实更贴切一些:
但仍然不是我想要的输出。每年都应该有自己的折线图,X轴是所有月份请按Asc顺序查询ClaimDate
$query = $db->prepare('SELECT * FROM Claims GROUP BY EXTRACT(MONTH FROM ClaimDate ) , EXTRACT( YEAR FROM ClaimDate ) ORDER BY ClaimDate ASC');
为了得到你描述的图表 1) 每年单独的行要求每个行单独的列(系列)
2) 整个hAxis的所有月份都需要一个离散轴(字符串值)
3) 图表还需要足够宽以显示所有标签 生成一个数据表,如下所示,包含12行,每个月一行
{
"cols":[
{"label":"Month","type":"string"},
{"label":"2014","type":"number"},
{"label":"2015","type":"number"},
{"label":"2016","type":"number"}
],
"rows":[
{"c":[{"v":"January"},{"v":1000},{"v":1200},{"v":1400}]},
{"c":[{"v":"February"},{"v":1600},{"v":1800},{"v":2000}]},
{"c":[{"v":"March"},{"v":2200},{"v":2400},{"v":2600}]},
...
]
}
要动态地创建它,请参见以下php中的注释
<?php
$query = $db->prepare('SELECT * FROM Claims GROUP BY EXTRACT(MONTH FROM ClaimDate ) , EXTRACT( YEAR FROM ClaimDate ) ORDER BY ClaimDate ASC');
$query->execute();
$rows1 = $query->fetchAll(PDO::FETCH_ASSOC);
$dates = array();
// create data table with initial month column
$results = array(
'cols' => array(
array('label' => 'Month', 'type' => 'string')
),
'rows' => array()
);
// create a column for each year in the data
$colYear = "";
foreach($rows1 as $row) {
$year = DateTime::createFromFormat('Y-m-d H:i:s', $row['ClaimDate'])->format('Y');
$year = strval($year);
if ($year != $colYear) {
$results['cols'][] = array('label' => $year, 'type' => 'number');
$colYear = $year;
}
}
// create hAxis ticks
$hTicks = array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');
// create 12 blank rows for each month
$chartRows = array();
foreach($hTicks as $hMonth) {
$blankRow = array(array('v' => $hMonth));
for ($x = 1; $x < count($results['cols']); ++$x) {
$blankRow[] = array('v' => null);
}
$chartRows[] = array('c' => $blankRow);
}
// fill in the rows from the data
foreach($rows1 as $row) {
// get year and month for current row
$year = DateTime::createFromFormat('Y-m-d H:i:s', $row['ClaimDate'])->format('Y');
$month = DateTime::createFromFormat('Y-m-d H:i:s', $row['ClaimDate'])->format('F');
$colYear = strval($year);
// find month row
for ($i = 0; $i < count($hTicks); ++$i) {
if ($hTicks[$i] == $month) {
// find year column
for ($x = 0; $x < count($results['cols']); ++$x) {
if ($results['cols'][$x]['label'] == $colYear) {
$chartRows[$i]['c'][$x]['v'] = $row['amount'];
}
}
}
}
}
$results['rows'] = $chartRows;
$json = json_encode($results);
?>
希望这有帮助,我以前用静态数据测试。。。
<?php
$query = $db->prepare('SELECT * FROM Claims GROUP BY EXTRACT(MONTH FROM ClaimDate ) , EXTRACT( YEAR FROM ClaimDate ) ORDER BY ClaimDate ASC');
$query->execute();
$rows1 = $query->fetchAll(PDO::FETCH_ASSOC);
$dates = array();
// create data table with initial month column
$results = array(
'cols' => array(
array('label' => 'Month', 'type' => 'string')
),
'rows' => array()
);
// create a column for each year in the data
$colYear = "";
foreach($rows1 as $row) {
$year = DateTime::createFromFormat('Y-m-d H:i:s', $row['ClaimDate'])->format('Y');
$year = strval($year);
if ($year != $colYear) {
$results['cols'][] = array('label' => $year, 'type' => 'number');
$colYear = $year;
}
}
// create hAxis ticks
$hTicks = array('January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December');
// create 12 blank rows for each month
$chartRows = array();
foreach($hTicks as $hMonth) {
$blankRow = array(array('v' => $hMonth));
for ($x = 1; $x < count($results['cols']); ++$x) {
$blankRow[] = array('v' => null);
}
$chartRows[] = array('c' => $blankRow);
}
// fill in the rows from the data
foreach($rows1 as $row) {
// get year and month for current row
$year = DateTime::createFromFormat('Y-m-d H:i:s', $row['ClaimDate'])->format('Y');
$month = DateTime::createFromFormat('Y-m-d H:i:s', $row['ClaimDate'])->format('F');
$colYear = strval($year);
// find month row
for ($i = 0; $i < count($hTicks); ++$i) {
if ($hTicks[$i] == $month) {
// find year column
for ($x = 0; $x < count($results['cols']); ++$x) {
if ($results['cols'][$x]['label'] == $colYear) {
$chartRows[$i]['c'][$x]['v'] = $row['amount'];
}
}
}
}
}
$results['rows'] = $chartRows;
$json = json_encode($results);
?>
<script src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load("visualization", "1", { packages: ["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart()
{
var data = new google.visualization.DataTable(<?php echo json_encode($json); ?>);
var chart = new google.visualization.LineChart(document.getElementById('line_chart'));
chart.draw(data, {
hAxis: {
ticks: <?php echo json_encode($hTicks); ?>
},
height: 400
});
}
</script>
<div id="line_chart"></div>