验证坐标在某坐标区域内php代码

<?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));