话不多说 上代码
/**
* @desc 根据两点间的经纬度计算距离
* @param float $lat 纬度值
* @param float $lng 经度值
*/
function getDistance($lat1, $lng1, $lat2, $lng2)
{
$earthRadius = 6367000; //approximate radius of earth in meters
$lat1 = ($lat1 * pi() ) / 180;
$lng1 = ($lng1 * pi() ) / 180;
$lat2 = ($lat2 * pi() ) / 180;
$lng2 = ($lng2 * pi() ) / 180;
$calcLongitude = $lng2 - $lng1;
$calcLatitude = $lat2 - $lat1;
$stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2);
$stepTwo = 2 * asin(min(1, sqrt($stepOne)));
$calculatedDistance = $earthRadius * $stepTwo;
$range=round($calculatedDistance);
if($range>1000){
$range = $range/1000;
}else{
$range = 1;
}
return array('range'=>$range);
}
赠送 一个 根据经纬度 进行附近 商家 筛选
$map['_string'] = "ACOS(SIN(('".$user['lat']."' * 3.1415) / 180 ) *SIN((latitude * 3.1415) / 180 ) +COS(('".$user['lat']."' * 3.1415) / 180 ) * COS((latitude * 3.1415) / 180 ) *COS(('".$user['long']."' * 3.1415) / 180 - (longitude * 3.1415) / 180 ) ) * 6380 <=50000";