feat : site

app/Extend/SystemUtil.php

@@ -57,4 +57,39 @@ class SystemUtil
     {
         return filter_var($realIp, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4);
     }
+
+    /**
+     * 计算距离
+     * @param array $locationOneArr
+     * @param array $locationTwoArr
+     * @param int $unit
+     * @return float|int
+     */
+    static function calculateDistance(array $locationOneArr, array $locationTwoArr, int $unit = 1): float|int
+    {
+        // 地球平均半径，单位：公里
+        $earthRadius = 6371;
+
+        // 提取经纬度
+        $lat1 = deg2rad($locationOneArr['lat']);
+        $lon1 = deg2rad($locationOneArr['lon']);
+        $lat2 = deg2rad($locationTwoArr['lat']);
+        $lon2 = deg2rad($locationTwoArr['lon']);
+
+        // 计算距离
+        $dLat = $lat2 - $lat1;
+        $dLon = $lon2 - $lon1;
+
+        $a = sin($dLat / 2) * sin($dLat / 2) + cos($lat1) * cos($lat2) * sin($dLon / 2) * sin($dLon / 2);
+        $c = 2 * atan2(sqrt($a), sqrt(1 - $a));
+
+        // 根据单位转换距离
+        $distance = $earthRadius * $c;
+        return match ($unit) {
+            1 => $distance,                 //公里
+            2 => $distance * 1000,       //英尺
+            3 => $distance * 3280.84,          //米
+            default => 0,
+        };
+    }
 }