jQuery handle null value in PHP variable or array

Handling php array or variable inside javascript directly using json_encode, will result some value null.
To check null using jquery in this case:

	parse php multidimensional array
	var operators = $.parseJSON('<?php echo json_encode($operators);?>');
	//example check for null
	if( operator[0].last_name !== null ){
		lastName = operator.last_name;
	}

By Keenlio, August 6, 2014