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php mysql select locations close to a given location from db using -'php,mysql,geolocation,distance,geography'

php mysql select locations close to a given location from db  using -'php,mysql,geolocation,distance,geography'

In PHP, I have the following code for calculating the distance between two locations:

function distance($lat1, $long1, $lat2, $long2) {
    $latitude1 = $lat1/180*pi();
    $longitude1 = $long1/180*pi();
    $latitude2 = $lat2/180*pi();
    $longitude2 = $long2/180*pi();
    // FORMULA: e = ARCCOS ( SIN(Latitude1) * SIN(Latitude2) + COS(Latitude1) * COS(Latitude2) * COS(Longitude2-Longitude1) ) * EARTH_RADIUS
    $distance = acos(sin($latitude1)*sin($latitude2)+cos($latitude1)*cos($latitude2)*cos($longitude2-$longitude1))*6371;
    return $distance;
echo distance(9.9921962, 53.5534074, 9.1807688, 48.7771056); // Hamburg, DE - Stuttgart, DE

But now, I want to select locations close to a given location via PHP from my MySQL database:

The user enters his hometown
My script gets the latitude/longitude values via the Google API
In my database, I have about 200 locations with a field for the latitude value and a field for the longitude value
I need a code for PHP and MySQL to select the 10 locations which are closest to the user's hometown

I hope you can help me. Thanks in advance!

asked Sep 7, 2015 by rajesh
0 votes

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