add phone numer format

readme.md

@@ -1279,6 +1279,18 @@ echo $faker->metropolitanCity; // "서울특별시"
 echo $faker->borough; // "강남구"
 ```
 
+### `Faker\Provider\ko_KR\PhoneNumer`
+
+```php
+<?php
+
+// Generates a local area phone numer
+echo $faker->localAreaPhoneNumber; // "02-1234-4567"
+
+// Generates a cell phone number
+echo $faker->cellPhoneNumber; // "010-9876-5432"
+```
+
 ### `Faker\Provider\lt_LT\Payment`
 
 ```php

src/Faker/Provider/ko_KR/PhoneNumber.php

@@ -4,14 +4,39 @@
 
 class PhoneNumber extends \Faker\Provider\PhoneNumber
 {
+    //reference : https://ko.wikipedia.org/wiki/%EB%8C%80%ED%95%9C%EB%AF%BC%EA%B5%AD%EC%9D%98_%EC%A0%84%ED%99%94%EB%B2%88%ED%98%B8_%EC%B2%B4%EA%B3%84
+
     protected static $formats = array(
-        '010-####-####',
+        //local area phone format
         '070-####-####',
         '02-####-####',
         '03#-####-####',
         '04#-####-####',
         '05#-####-####',
         '06#-####-####',
-        '1588-####',
+
+        //cell phone format
+        '010-####-####',
+
+        //others: Intelligent Network(기간통신사업자)
+        '15##-####',
+        '16##-####',
+        '18##-####',
     );
+
+    public function localAreaPhoneNumber()
+    {
+        $format = self::randomElement(array_slice(static::$formats, 0, 6));
+
+        return self::numerify($this->generator->parse($format));
+    }
+
+
+
+    public function cellPhoneNumber()
+    {
+        $format = self::randomElement(array_slice(static::$formats, 6, 1));
+
+        return self::numerify($this->generator->parse($format));
+    }
 }