无详细内容 无 ?phpdefine('EARTH_RADIUS', 6370.6935);function vicinity($lng, $lat, $distance = 5) {//$distance = 5;// 单位 1KM$radius = EARTH_RADIUS;$dlng = abs(rad2deg(2*asin(sin($distance/(2*$radius))/cos($lat))));$dlat = abs(rad2deg($dist
<?php
define('EARTH_RADIUS', 6370.6935);
function vicinity($lng, $lat, $distance = 5) {
//$distance = 5; // 单位 1KM
$radius = EARTH_RADIUS;
$dlng = abs(rad2deg(2*asin(sin($distance/(2*$radius))/cos($lat))));
$dlat = abs(rad2deg($distance/$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));
}
