php判断坐标是否在指定的多边形中

composer require mjaschen/phpgeo

<?php
require './vendor/autoload.php';
 
//引入两个类
use Location\Coordinate;
use Location\Polygon;
 
//绘制一个多边形
$geo = new Polygon();
 
$geo->addPoint(new Coordinate(39.930131, 116.417301));
$geo->addPoint(new Coordinate(39.930131, 116.377476));
$geo->addPoint(new Coordinate(39.911305, 116.377476));
$geo->addPoint(new Coordinate(39.911305, 116.417301));
 
//两个坐标做测试
$a = new Coordinate(39.916527, 116.397128);
$b = new Coordinate(39.901305, 116.397128);
 
//判断是否在执行的多边形中
if ($geo->contains($a)) {
    echo "a点在多边形的范围内";
} else {
    echo "a点不在多边形的范围内";
}
 
echo "<br/>";
 
if ($geo->contains($b)) {
    echo "b点在多边形的范围内";
} else {
    echo "b点不在多边形的范围内";
}