增加通过 IP 获取国家信息

application/third_party/ip2location/controllers/index.php

@@ -24,6 +24,17 @@ class Index extends CI_Controller
         echo json_encode($data);
     }
 
+    public function get_country() {
+      $data = array();
+      //优先读取参数ip地址，没有则自动判断客户端地址
+      $data['ip_address'] = $this->input->get_post('ip_address');
+      if (empty($data['ip_address'])) {
+          $data['ip_address'] = $this->input->ip_address();
+      }
+      $country = $this->Ip2location_db1_model->get_country_by_ip($data['ip_address']);
+      echo json_encode($data);
+    }
+
     /**
      * 根据 IP 判断是否是欧盟国家
      * http://localhost:8003/index.php/apps/ip2location/index/is_eu_country?ip_address=159.8.126.74

application/third_party/ip2location/models/ip2location_db1_model.php

@@ -13,6 +13,33 @@ class Ip2location_db1_model extends CI_Model
     }
 
 
+    public function get_country_by_ip($ip_address)
+    {
+        $sql = "
+            SELECT TOP 1 ipdb.country_code, ipdb.country_name
+            FROM   ip2location_db1 ipdb
+            WHERE  ? BETWEEN ipdb.ip_from AND ipdb.ip_to 
+        ";
+        $query = $this->INFO->query($sql, array($ip_address));
+
+        $country = array(
+          'country_code' => '',
+          'country_name' => ''          
+        );
+
+        if ($query->num_rows() > 0) {
+            $row = $query->row();
+            $country = [
+              'ip_address' => $ip_address,
+              'country_code' => $row->country_code,
+              'country_name' => $row->country_name
+          ];
+        }
+        
+        return $country;
+    }
+
+
     public function get_country_code($ip_number)
     {
         $sql = "