Baidu Map API application to obtain the user's specific location_PHP tutorial

var map = new BMap.Map("allmap"); //Instantiate one Map object
var point = new BMap.Point(116.331398,39.897445); //Set the location of the map center
map.centerAndZoom(point,12); //Set the visual layer of the map element

map.enableScrollWheelZoom(); //Enable scroll wheel zooming, disabled by default
map.enableContinuousZoom(); //Enable map inertial drag, disabled by default

function myFun(result){
var cityName = result.name;
map.setCenter(cityName);

}
var myCity = new BMap.LocalCity();
myCity.get(myFun);

i=0
//Click to get the coordinates
map.addEventListener("click",function(e){

if(i === 0)
{
//Storage latitude and longitude
lng = e.point.lng;
lat = e.point.lat;

//Draw points on the map
var marker = new BMap.Marker (new BMap.Point(lng,lat)); // Create a marker
map.addOverlay(marker);
marker.enableDragging(); // Can be dragged

var gc = new BMap.Geocoder();
//Get the data address of the address
var pt = e.point;
gc.getLocation(pt, function(rs){
var addComp = rs.addressComponents;
address = addComp.province + addComp.city + addComp.district + addComp.street + addComp.streetNumber;

//Drawing
var label = new BMap.Label(address,{offset: new BMap.Size(20,-10)});
marker.setLabel(label);
});

i=1;
}

} );