Verify the php code of the coordinates in a coordinate area,

Verify the php code of the coordinates in a coordinate area,

The previous requirement was to display the company's services on a map, the user's daily access coordinates are calculated to see how many users are within the radius of the service range that can be reached.

The following is the implementation of the PHP code (only verify that the coordinates are in a coordinate area)

<? Php/*** verify whether the coordinate point is in a certain area * @ author xiaoliang <1058436713@qq.com> * Class validationMap */class validationMap {private static $ coordArray; private static $ vertx = []; private static $ verty = [];/*** set the coordinate Region * @ param mixed $ coordArray */public static function setCoordArray (array $ coordArray) {self: $ coordArray = $ coordArray;}/*** verification region range * @ param array $ coordArray * @ return bool */public static fu Nction isCityCenter (array $ coordArray) {if (! Self: vaildatePoint ($ coordArray) {return false;} return self: pnpoly (count (self: $ coordArray), $ coordArray ['lng '], $ coordArray ['lat']);} /*** compare Region coordinates ** @ 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;}/*** verify coordinate * @ 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 = [// Shanghai ["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]; // The verification region validationMap: setCoordArray ($ map); var_dump (validationMap :: isCityCenter ($ array ));

Application in map: