<?php/** * 验证坐标点是否在某区域内 * @author xiaoliang <1058436713@qq.com> * 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 < $nvert; $j = $i++) {            if ( ( (self::$verty[$i]>$testy) != (self::$verty[$j]>$testy) ) && ($testx < (self::$vertx[$j]-self::$vertx[$i]) * ($testy-self::$verty[$i]) / (self::$verty[$j]-self::$verty[$i]) + self::$vertx[$i]) )                $c = !$c;        }        return $c;    }    /**     * 验证坐标     * @param array $pointArray     * @return bool     */    private static function vaildatePoint(array $pointArray){        $maxY = $maxX = 0;        $minY = $minX = 9999;        foreach (self::$coordArray as $item){            if($item[‘lng‘]>$maxX) $maxX = $item[‘lng‘];            if($item[‘lng‘] < $minX) $minX = $item[‘lng‘];            if($item[‘lat‘]>$maxY) $maxY = $item[‘lat‘];            if($item[‘lat‘] < $minY) $minY = $item[‘lat‘];            self::$vertx[] = $item[‘lng‘];            self::$verty[] = $item[‘lat‘];        }        if ($pointArray[‘lng‘] < $minX || $pointArray[‘lng‘] > $maxX || $pointArray[‘lat‘] < $minY || $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));