php 判斷一個點的經緯度是否在多邊形或圓裏

<?php /** * Created by PhpStorm. * User: 申大俠 * Date: 2018/7/11 * Time: 9:19 */ class Convert{ private $PI = 3.14159265358979324; private $x_pi = 0; public function __construct()

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