Hi,
I'm woking on a PHP app that should show visitors in a world map, base on their ip-addresses.
Have you tried/used any geo-information library in PHP? Something that can convert ip-addresses into geo-information? If so, please share your experience and recommendations.
Reading from the Google Map Documentation:
As a user's IP address can only provide a rough estimate of a user's location, we don't recommend using this approach for geolocation. The W3C approach is the easiest and most fully-supported so it should be prioritized over other methods.
Currently, several ways exist to detect the user's location within a browser. None of these methods are part of the Google Maps API; instead, they are common industry standards. Newer browsers are starting to support the W3C Geolocation standard. This standard is part of HTML5 and will likely become the de-facto standard going forward. All applications that wish to perform geolocation should support this standard. Some browsers with Google Gears can use Google Gears Geolocation API. Since widespread support for the W3C standard is still forthcoming, checking for Gears is a good fallback mechanism. Some browsers use IP addresses to detect a user's location, though this provides only a very rough estimate.