计算直线距离

application/index/controller/ImageDepot.php

@@ -3,6 +3,7 @@
 namespace app\index\controller;
 
 use app\index\extend\Basic;
+use app\index\service\PositionService;
 use app\index\service\UserCallStintService;
 use app\model\GImageDepot;
 
@@ -179,14 +180,19 @@ class ImageDepot extends Basic
 
     public function ceshi()
     {
-        $m = new UserCallStintService();
-        $user_id = 87;//135558  135562  87
-        // $res = $m->getUserBindList($user_id);
-        $res = $m->getUserReportAgentIdList($user_id);
-        dump($res);
+        $position_service = new PositionService();//121.168936,32.174486  121.187333,30.691674
+        $is_ = $position_service->checkDistance('32.174486', '121.168936', '30.691674', '121.187333', 500);
+        dump($is_);
+        $a = $position_service->getDistance('32.174486', '121.168936', '30.691674', '121.187333');
+        dump($a);
+
+
     }
 
 
 
+
+
+
     }
 

application/index/service/PositionService.php

@@ -54,7 +54,7 @@ class PositionService
         $first_position = $a_latitude . ',' . $a_longitude;
         $end_position = $b_latitude . ',' . $b_longitude;
         $distance = $this->getPositionDistance($first_position, $end_position);
-
+        dump($distance);
         if ($distance <= $limit_distance) {
             $result = true;
         } else {
@@ -63,4 +63,26 @@ class PositionService
 
         return $result;
     }
+
+
+
+    /**
+     * 计算直线距离 举个栗子：('32.174486', '121.168936', '30.691674', '121.187333')
+     * @param $lat1
+     * @param $lng1
+     * @param $lat2
+     * @param $lng2
+     * @return int
+     */
+    function getDistance($lat1, $lng1, $lat2, $lng2){
+        // 将角度转为狐度
+        $radLat1 = deg2rad($lat1);// deg2rad()函数将角度转换为弧度
+        $radLat2 = deg2rad($lat2);
+        $radLng1 = deg2rad($lng1);
+        $radLng2 = deg2rad($lng2);
+        $a = $radLat1 - $radLat2;
+        $b = $radLng1 - $radLng2;
+        $s = 2 * asin(sqrt(pow(sin($a / 2), 2)+cos($radLat1) * cos($radLat2) * pow(sin($b / 2), 2))) * 6378.137;
+        return $s;
+    }
 }
\ No newline at end of file