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    <p>first of all use a map and ask the user to set his approximate location, get that values, with this code get the distance to each store:</p> <p>google.maps.geometry.spherical.computeDistanceBetween (latLngA, latLngB);</p> <p>from <a href="https://developers.google.com/maps/documentation/javascript/reference?hl=en-US#spherical" rel="nofollow noreferrer">https://developers.google.com/maps/documentation/javascript/reference?hl=en-US#spherical</a></p> <p>now choose the shorter and output it</p> <p>but I'd rather ask him to input the City and get the distance through Wolfram api request</p> <pre><code> $city=customer_city; $north=store_north; //coordinate_l $west=store_west; //coordinate_L $wolfram_query="http://api.wolframalpha.com/v2/query?appid=".$appid."&amp;input=distance%20from%20".$city."%20to%20".$north."N%20".$west."W%20in%20km&amp;format=image,plaintext"; </code></pre> <p>and get the distance from the xml answer leaving google maps out</p> <p>an other option using zipcodes is to calculate the spherical distance from two coordinates with this php function inside a while loop going through all the lat and long of the sores:</p> <pre><code>function calcDist($lat_A, $long_A, $lat_store[i], $long_store[i]) { $distance = sin(deg2rad($lat_A)) * sin(deg2rad($lat_B)) + cos(deg2rad($lat_A)) * cos(deg2rad($lat_B)) * cos(deg2rad($long_A - $long_B)); $distance = (rad2deg(acos($distance))) * 69.09; return $distance; } </code></pre> <p>distance is in miles, if you want the distance in km use this</p> <pre><code> function miles2kms($miles) { $ratio = 1.609344; $kms = $miles * $ratio; return $kms; } </code></pre> <p>and you can retrieve the lat and long of the zip code using this database: <a href="http://sourceforge.net/projects/zips/files/#files" rel="nofollow noreferrer">http://sourceforge.net/projects/zips/files/#files</a> or this <a href="http://postcodedb.sourceforge.net/dumpCSV.php" rel="nofollow noreferrer">http://postcodedb.sourceforge.net/dumpCSV.php</a></p> <p>to improve the result of the distance you should use Haversine or Vincenty calculations... which are a little more complex..</p> <p>... but what we like of the net is that someone has surely done this before we did, and of course shared his efforts! <a href="http://www.phpclasses.org/package/6480-PHP-Calculate-the-distance-between-Earth-two-points.html" rel="nofollow noreferrer">http://www.phpclasses.org/package/6480-PHP-Calculate-the-distance-between-Earth-two-points.html</a> this is a class that implements haversine distance! this might be better... if you want to use Vincenty try this: <a href="https://stackoverflow.com/questions/11416767/implementing-vincentys-formula-in-php">Implementing Vincenty&#39;s Formula in PHP</a> , try which one gives you the best results, even if the most accurate will always be wolfram, mathematicians worked on that, so that works pretty well ;)</p>
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    1. POHow to retrieve the closest store we have placed with a marker in google maps?
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    1. POHow to retrieve the closest store we have placed with a marker in google maps?
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    1. COO great this one might even be better, ill definitely look in to this one. Thanks Anze
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    2. COyou welcome! if this solves your problem mark it as the answer, if you need hel, ask!
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    3. COI am not sure if the wolfram script is going to work because there are not 2 stores, a north and a south like the script does assume. It could contain 1000 stores and from the 1000 stores I need only the closest one. I think you can't place all those vars in one url.
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