如何从Codeigniter中的给定地址获取纬度和经度

Question

• This is my jQuery code:

        $(document).ready(function(){
  
             $("#landmark").focusout(function(){
             var geocoder = new google.maps.Geocoder();
             var address = $("#landmark").val();
             if(address!="")
             {
             geocoder.geocode( { 'address': address}, function(results, 
             status) {
  
               if (status == google.maps.GeocoderStatus.OK) {
                 var latitude = results[0].geometry.location.lat();
                 var longitude = results[0].geometry.location.lng();
                 $("#lat").val(latitude);
                 $("#longi").val(longitude); 
                 }   
             });
             }
           });
         });
  

  This doesn't work with Codeigniter - do I need to add some library files in Codeigniter?