【PHP版】火星坐标系 (GCJ-02) 与百度坐标系 (BD-09ll)转换算法

首先感谢java版作者@宋宋宋伟，java版我是看http://blog.csdn.net/coolypf/article/details/8569813

然后根据java代码修改成了php代码。

     <?php

     /**
      * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 将 GCJ-02 坐标转换成 BD-09 坐标
      *
      * @param gg_lat
      * @param gg_lon
      * @return
      */
     function gcj02_To_Bd09($gg_lon, $gg_lat) {
         $x = $gg_lon;
         $y = $gg_lat;
         $z = Math.sqrt($x * $x + $y * $y) + 0.00002 * Math.sin($y * pi());
         $theta = Math.atan2($y, $x) + 0.000003 * Math.cos($x * pi());
         $bd_lon = $z * Math.cos($theta) + 0.0065;
         $bd_lat = $z * Math.sin($theta) + 0.006;
         return array($bd_lon, $bd_lat);
     }

     /**
      * 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法   将 BD-09 坐标转换成GCJ-02 坐标
      *
      * @param bd_lon
      * @param bd_lat
      * @return
      */
     function bd09_To_Gcj02($bd_lon, $bd_lat) {
         $x = $bd_lon - 0.0065;
         $y = $bd_lat - 0.006;
         $z = sqrt($x * $x + $y * $y) - 0.00002 * sin($y * pi());
         $theta = atan2($y, $x) - 0.000003 * cos($x * pi());
         $gg_lon = $z * cos($theta);
         $gg_lat = $z * sin($theta);
         return array($gg_lon, $gg_lat);
     }

     function coordinate_switch($a,$b){//百度转腾讯坐标转换
       $x = (double)$b - 0.0065;
       $y = (double)$a - 0.006;
       $x_pi = 3.14159265358979324;
       $z = sqrt($x * $x+$y * $y) - 0.00002 * sin($y * $x_pi);
       $theta = atan2($y,$x) - 0.000003 * cos($x*$x_pi);
       $gb = number_format($z * cos($theta),15);
       $ga = number_format($z * sin($theta),15);
       return ['Latitude'=>$ga,'Longitude'=>$gb];
     }

     function coordinate_switchf($a,$b){//腾讯转百度坐标转换
       $x = (double)$b ;
       $y = (double)$a;
       $x_pi = 3.14159265358979324;
       $z = sqrt($x * $x+$y * $y) + 0.00002 * sin($y * $x_pi);
       $theta = atan2($y,$x) + 0.000003 * cos($x*$x_pi);
       $gb = number_format($z * cos($theta) + 0.0065,6);
       $ga = number_format($z * sin($theta) + 0.006,6);

       return ['Latitude'=>$ga,'Longitude'=>$gb];

     }

     // // 113.139278,23.112388
     $bd_lon = 23.112388;
     $bd_lat = 113.139278;
     // print_r(bd09_To_Gcj02($bd_lon, $bd_lat));
     print_r(coordinate_switch($bd_lon, $bd_lat));
     // // 23.106200，113.132840
     $gg_lon = 23.106200;
     $gg_lat = 113.132840;
     // print_r(gcj02_To_Bd09($gg_lon, $gg_lat));
     print_r(coordinate_switchf($gg_lon, $gg_lat));