Fixes #925

- Override $e164Formats in order to provide locale specific phone
  numbers (mobile and landline) in E.164 format.

- Add constants / static properties for common formatting codes (country,
  area and mobile service).

- Add methods 'e164MobileNumber' and 'e164LandlineNumber' to provide
  mobile-only and landline-only phone numbers, respectively.

src/Provider/pt_PT/PhoneNumber.php

@@ -4,36 +4,74 @@
 
 class PhoneNumber extends \Faker\Provider\PhoneNumber
 {
+    /**
+     * Returns the pt_PT phone country code.
+     */
+    const COUNTRY_CODE = '+351';
+
+    /**
+     * pt_PT Mobile Service Codes
+     */
+    protected static $mobileServiceCode = [
+        91,
+        92,
+        93,
+        96,
+    ];
+
+    /**
+     * pt_PT Geographic Area Codes
+     */
+    protected static $areaCode = [
+        21,
+        22,
+        23,
+        24,
+        25,
+        26,
+        27,
+        28,
+        29,
+    ];
+
+    /**
+     * pt_PT Geographic Area and Mobile Service Codes
+     */
+    protected static $areaOrMobileServiceCode = [
+        91,
+        92,
+        93,
+        96,
+        21,
+        22,
+        23,
+        24,
+        25,
+        26,
+        27,
+        28,
+        29,
+    ];
+
     /**
      * @see http://en.wikipedia.org/wiki/Telephone_numbers_in_Portugal
      */
     protected static $formats = [
-        '+351 91#######',
-        '+351 92#######',
-        '+351 93#######',
-        '+351 96#######',
-        '+351 21#######',
-        '+351 22#######',
-        '+351 23#######',
-        '+351 24#######',
-        '+351 25#######',
-        '+351 26#######',
-        '+351 27#######',
-        '+351 28#######',
-        '+351 29#######',
-        '91#######',
-        '92#######',
-        '93#######',
-        '96#######',
-        '21#######',
-        '22#######',
-        '23#######',
-        '24#######',
-        '25#######',
-        '26#######',
-        '27#######',
-        '28#######',
-        '29#######',
+        '{{countryCode}} {{areaOrMobileServiceCode}}#######',
+        '{{mobileServiceCode}}#######',
+        '{{areaCode}}#######',
+    ];
+
+    protected static $e164Formats = [
+        '{{countryCode}}{{areaOrMobileServiceCode}}#######',
+    ];
+
+    protected static $e164MobileFormat = [
+        '{{countryCode}}{{mobileServiceCode}}#######',
+    ];
+
+    protected static $e164LandlineFormat = [
+        '{{countryCode}}{{areaCode}}#######',
     ];
 
     protected static $mobileNumberPrefixes = [
@@ -47,4 +85,53 @@ public static function mobileNumber()
     {
         return static::numerify(static::randomElement(static::$mobileNumberPrefixes));
     }
+
+    public static function areaOrMobileServiceCode()
+    {
+        return self::randomElement(static::$areaOrMobileServiceCode);
+    }
+
+    public static function areaCode()
+    {
+        return self::randomElement(static::$areaCode);
+    }
+
+    public static function mobileServiceCode()
+    {
+        return self::randomElement(static::$mobileServiceCode);
+    }
+
+    /**
+     * Returns the pt_PT phone country code.
+     *
+     * @return string
+     */
+    public static function countryCode()
+    {
+        return self::COUNTRY_CODE;
+    }
+
+    /**
+     * Returns a pt_PT mobile number in E.164 format.
+     * 
+     * Example: +35193XXXXXXX
+     *
+     * @return string
+     */
+    public function e164MobileNumber()
+    {
+        return static::numerify($this->generator->parse(static::randomElement(static::$e164MobileFormat)));
+    }
+
+    /**
+     * Returns a pt_PT landline number in E.164 format.
+     * 
+     * Example: +35121XXXXXXX
+     *
+     * @return string
+     */
+    public function e164LandlineNumber()
+    {
+        return static::numerify($this->generator->parse(static::randomElement(static::$e164LandlineFormat)));
+    }
 }