Format used for date in Highcharts - Line with markers chart type

Question

What kind of format has the date been converted to in https://www.highcharts.com/stock/demo/line-markers?

I am generating data but I need to convert the data into this format, strtotime doesn't seem to do the trick.

Answer 1

You just need to multiply by 1000 the PHP timestamp to have a javascript timestamp

var jsTimestamp = 1545055048 * 1000