Highchart Date Series In Formatting X-Axisif

If formatting date in x-axis in Javascript,


xAxis: {

                type: 'datetime',

                dateTimeLabelFormats: { // don't display the dummy year

                    month: '%e. %b',

                    year: '%b'

                }

            }, 

How can I equate it into php??


'xAxis' => array(

	'type'=>'datetime',

	'dateTimeLabelFormats'=> array( // don't display the dummy year

	    'month' => '%e %b',

	    'year' => '%y'

	),

This will show x-axis like 23:59:57