PHP根據gps座標搜尋附近

define('EARTH_RADIUS', 6370.6935); function vicinity($lng, $lat, $distance = 0.5) { //$distance = 0.5; // 單位 10KM $radius = EARTH_RADIUS; $dlng = rad2deg(2*asin(sin($distance/(2*$radius))/cos($lat))); $dlat = rad2deg($distance*10/$radius); $lng_left = round($lng - $dlng, 6); $lng_right = round($lng + $dlng, 6); $lat_top = round($lat + $dlat, 6); $lat_bottom = round($lat - $dlat, 6); return array('lng'=> array('left'=> $lng_left, 'right'=> $lng_right), 'lat'=> array('top'=> $lat_top, 'bottom'=> $lat_bottom)); } 複製代碼

PHP, gps

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