How to get user near location product on google map

Question

hello,


in my website its baeds on restaurants which is add by Admin

now user search some restaurant but not found then i want to show near location restaurants which is added bye admin

when we add restaurants then we store country/state/city/ address and longt/lati of google map to show

i dont get any idea how to show user location based near location restaurants list


suppos

i from New delhi then show me list of restaurants Delhi ,Noida ,Gurgaon. theas City is near to delhi

and show on google map

so plese tell me how to show

thanks