edit

src/Api.php

@@ -105,7 +105,7 @@ class Api
      *
      * @return mixed
      */
-    public function string($area)
+    public function string($area, $im = ',')
     {
         if ($area) {
             $area = explode(',', $area);
@@ -115,11 +115,14 @@ class Api
                     $result[$k] = $this->getName('province', $v);
                 } elseif ($k == 1) {
                     $result[$k] = $this->getName('city', $v);
+                    if ($result[0]['name'] == $result[1]['name']) {
+                        unset($result[1]);
+                    }
                 } elseif ($k == 2) {
                     $result[$k] = $this->getName('county', $v);
                 }
             }
-            return implode(',', $result);
+            return implode($im, $result);
         }
         return '';
     }