PHP berechnet den Abstand zwischen zwei Punkten anhand geografischer Koordinaten

Funktion: Berechnen Sie den sphärischen Abstand zwischen zwei Punkten basierend auf pi und Erdradiuskoeffizient sowie dem Längen- und Breitengrad der beiden Punktkoordinaten.
Ermitteln Sie den Koordinatenabstand zweier Punkte:

<code><span><span><?php</span><span>/**
 * 计算两点地理坐标之间的距离
 *<span> @param</span>  Decimal $longitude1 起点经度
 *<span> @param</span>  Decimal $latitude1  起点纬度
 *<span> @param</span>  Decimal $longitude2 终点经度 
 *<span> @param</span>  Decimal $latitude2  终点纬度
 *<span> @param</span>  Int     $unit       单位 1:米 2:公里
 *<span> @param</span>  Int     $decimal    精度 保留小数位数
 *<span> @return</span> Decimal
 */</span><span><span>function</span><span>getDistance</span><span>(<span>$longitude1</span>, <span>$latitude1</span>, <span>$longitude2</span>, <span>$latitude2</span>, <span>$unit</span>=<span>2</span>, <span>$decimal</span>=<span>2</span>)</span>{</span><span>$EARTH_RADIUS</span> = <span>6370.996</span>; <span>// 地球半径系数</span><span>$PI</span> = <span>3.1415926</span>;

    <span>$radLat1</span> = <span>$latitude1</span> * <span>$PI</span> / <span>180.0</span>;
    <span>$radLat2</span> = <span>$latitude2</span> * <span>$PI</span> / <span>180.0</span>;

    <span>$radLng1</span> = <span>$longitude1</span> * <span>$PI</span> / <span>180.0</span>;
    <span>$radLng2</span> = <span>$longitude2</span> * <span>$PI</span> /<span>180.0</span>;

    <span>$a</span> = <span>$radLat1</span> - <span>$radLat2</span>;
    <span>$b</span> = <span>$radLng1</span> - <span>$radLng2</span>;

    <span>$distance</span> = <span>2</span> * asin(sqrt(pow(sin(<span>$a</span>/<span>2</span>),<span>2</span>) + cos(<span>$radLat1</span>) * cos(<span>$radLat2</span>) * pow(sin(<span>$b</span>/<span>2</span>),<span>2</span>)));
    <span>$distance</span> = <span>$distance</span> * <span>$EARTH_RADIUS</span> * <span>1000</span>;

    <span>if</span>(<span>$unit</span>==<span>2</span>){
        <span>$distance</span> = <span>$distance</span> / <span>1000</span>;
    }

    <span>return</span> round(<span>$distance</span>, <span>$decimal</span>);

}

<span>// 起点坐标</span><span>$longitude1</span> = <span>113.330405</span>;
<span>$latitude1</span> = <span>23.147255</span>;

<span>// 终点坐标</span><span>$longitude2</span> = <span>113.314271</span>;
<span>$latitude2</span> = <span>23.1323</span>;

<span>$distance</span> = getDistance(<span>$longitude1</span>, <span>$latitude1</span>, <span>$longitude2</span>, <span>$latitude2</span>, <span>1</span>);
<span>echo</span><span>$distance</span>.<span>'m'</span>; <span>// 2342.38m</span><span>$distance</span> = getDistance(<span>$longitude1</span>, <span>$latitude1</span>, <span>$longitude2</span>, <span>$latitude2</span>, <span>2</span>);
<span>echo</span><span>$distance</span>.<span>'km'</span>; <span>// 2.34km</span><span>?></span></span></code>

Urheberrechtserklärung: Dieser Artikel ist ein Originalartikel des Bloggers und möglicherweise nicht ohne die Erlaubnis des Bloggers reproduziert werden.

Das Obige stellt die Berechnung des Abstands zwischen zwei geografischen Koordinaten in PHP vor, einschließlich des Inhalts. Ich hoffe, dass es für Freunde hilfreich ist, die sich für PHP-Tutorials interessieren.