x轴带有日期和时间的高位图表（来自格式为YYYYMMDDHHMM的数据库）

Question

I am trying to draw a graph using Highcharts for values with time and date for x axis. My database has the date values as YYYYMMDDHHMM (201409011345) and I want to plot y values with this date and time. my code is as follows ;

<?php
while ($row = mysql_fetch_array($result)) {
   extract $row;
   $data[] = "[$datetime, $value]"; //here $datetime is like 201405242625 (YYYYMMDDHHMM)
}
?>
var chart = new Highcharts.Chart({
      chart: {
         renderTo: 'container'
      },
      series: [{
         data: [<?php echo join($data, ',') ?>]
      }]
});

Please give me any suggestions to get the correct datetime values for x axis

Thanks

Answer 1

Your date value needs to either be in epoch format, or a Date.UTC object.

I'm not sure how well PHP will understand your date format, but assuming that it can, you can use the strtotime() function.

In you case, it would be

$date_stamp = strtotime($datetime) * 1000

You need the * 1000 because PHP uses epoch time in seconds, Javascript uses milliseconds.

If PHP has a hard time interpreting your date format, you may need to format it within your database query, or use PHP's substr() function to break it up into its components and rebuild a readable date format.

References:

• http://www.epochconverter.com/

• http://php.net/manual/en/function.strtotime.php

• How to list dates (day-by-day) on xAxis using HighCharts