show me the latitude and longitude of that address

I want to implement the google geocoder in my website, so that if I give the address of any location it gives me the latitude and longitude of that address. Are there any tutorials?

Just like this website: http://itouchmap.com/latlong.html

In this website I give the location of the address and it gives me the latitude and longitude of that address, I want to do开发者_如何学C this, using php and javascript.

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The official Google Maps docs, and the accompanying tutorials are really pretty good. edit: link now points to the docs.