验证坐标在某片坐标区域内 php 代码

以下是PHP代码的实现 (仅验证坐标在某片坐标区域内)

 * Class validationMap
 */
class validationMap{
    private static $coordArray;
    private static $vertx = [];
    private static $verty = [];
    /**
     * 设置坐标区域
     * @param mixed $coordArray
     */
    public static function setCoordArray(array $coordArray)
    {
        self::$coordArray = $coordArray;
    }
    /**
     * 验证区域范围
     * @param array $coordArray
     * @return bool
     */
    public static function isCityCenter(array $coordArray){
        if(!self::vaildatePoint($coordArray)){
            return false;
        }
        return self::pnpoly(count(self::$coordArray), $coordArray['lng'], $coordArray['lat']);
    }
    /**
     * 比较区域坐标
     * @param $nvert
     * @param $testx
     * @param $testy
     * @return bool
     */
    private static function pnpoly($nvert,$testx, $testy)
    {
        $c = false;
        for ($i = 0, $j = $nvert-1; $i $testy) != (self::$verty[$j]>$testy) ) && ($testx $maxX) $maxX = $item['lng'];
            if($item['lng'] $maxY) $maxY = $item['lat'];
            if($item['lat']  $maxX || $pointArray['lat']  $maxY) {
            return false;
        }
        return true;
    }
}
/**************************** test *************************************/
$map = [  //上海
    ["lng" => 121.488286, "lat" => 31.420147],
    ["lng" => 121.702154, "lat" => 31.294828],
    ["lng" => 121.780918, "lat" => 31.141157],
    ["lng" => 121.782068, "lat" => 30.941157],
    ["lng" => 121.492885, "lat" => 30.909931],
    ["lng" => 121.22325, "lat" => 30.890099],
    ["lng" => 121.161482, "lat" => 31.015526],
    ["lng" => 121.076395, "lat" => 31.226239],
    ["lng" => 121.189873, "lat" => 31.339688],
    ["lng" => 121.459509, "lat" => 31.41368],
];
$array = ["lat"=>31.218681,"lng"=>121.08604];//进行验证的区域
validationMap::setCoordArray($map);
var_dump(validationMap::isCityCenter($array));