how to find the distance (in km, or meter) between two city
 I am developing a php web site. Here I want to calculate the distance between two cities, For example a user enters Bangalore as departure and Delhi as the arrival place. I want to 
Find out the distance between Bangalore and Delhi. 

Anyone knows how to do this. I have searched a lot; I don't want to enter the co-ordinates.



Thanks in advance
how to find the distance (in km, or meter) between two city
===

 I am developing a php web site. Here I want to calculate the distance between two cities, For example a user enters Bangalore as departure and Delhi as the arrival place. I want to 
Find out the distance between Bangalore and Delhi. 

Anyone knows how to do this. I have searched a lot; I don't want to enter the co-ordinates.



Thanks in advance