title: Google Map: is a lat/lng within a polygon?
body: <p>Given a pair of lat/lng values, how do I determine if the pair is within a polygon? I need to do this in PHP. I see that Google Maps API has a <code>containsLocation</code> method: <a href="https://developers.google.com/maps/documentation/javascript/reference">https://developers.google.com/maps/documentation/javascript/reference</a>. Is there a way to leverage this from PHP?</p>