Change 'a' to return 'A' since Intl always seems to return AM/PM vs am/pm in my tests.

Throwing Exception when unimplemented symbol is used.
Adding license file and updating README

Author: phpnut

LICENSE.txt

@@ -0,0 +1,26 @@
+The MIT License
+
+Copyright 2017
+Cake Development Corporation
+1785 E. Sahara Avenue, Suite 490-423
+Las Vegas, Nevada 89104
+Phone: +1 702 425 5085
+https://www.cakedc.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -0,0 +1,65 @@
+CakeDC Intl Plugin
+===================
+
+This plugin library was created to help developers that do not have access to install the PHP intl extension.
+It is not met to be a full replace for the PHP extension since it is limited in functionality and should be used with caution.
+
+Versions and branches
+============
+
+**This code is still in ALPHA stages**
+
+
+Requirements
+============
+
+* CakePHP 3.0+
+* PHP 5.6+ without intl extension (it will still install, but what is the point if you the extension).
+
+Installation
+============
+
+Composer
+------
+Replace my_app with name of directory you will use.
+```
+composer self-update && composer create-project --prefer-dist cakephp/app my_app_name --ignore-platform-reqs
+composer require cakedc/intl
+composer update
+```
+Changes needed in CakePHP
+------
+
+in config/bootstrap.php change 
+```
+if (!extension_loaded('intl')) {
+     trigger_error('You must enable the intl extension to use CakePHP.', E_USER_ERROR);
+}
+```
+to
+
+```
+if (!extension_loaded('intl')) {
+     //trigger_error('You must enable the intl extension to use CakePHP.', E_USER_ERROR);
+}
+```
+
+
+Support
+============
+
+For bugs and feature requests, please use the [issues](https://github.com/CakeDC/users/issues) section of this repository.
+
+Commercial support is also available, [contact us](https://www.cakedc.com/contact) for more information.
+
+Contributing
+============
+
+This repository follows the [CakeDC Plugin Standard](https://www.cakedc.com/plugin-standard). If you'd like to contribute new features, enhancements or bug fixes to the plugin, please read our [Contribution Guidelines](https://www.cakedc.com/contribution-guidelines) for detailed instructions.
+
+License
+============
+
+Copyright 2017 Cake Development Corporation (CakeDC). All rights reserved.
+
+Licensed under the [MIT](http://www.opensource.org/licenses/mit-license.php) License. Redistributions of the source code included in this repository must retain the copyright notice found in each file.

src/Utility/PatternParser.php

@@ -20,12 +20,6 @@ class PatternParser
      */
     private $symbols =
         [
-            'GGGGG' => 'A',
-            'GGGGG' => 'A',
-            'GGGG' => 'Anno Domini',
-            'GGG' => 'AD',
-            'GG' => 'AD',
-            'G' => 'AD',
             'yyyy' => 'Y',
             'yy' => 'y',
             'y' => 'Y',
@@ -55,7 +49,7 @@ class PatternParser
             'ccc' => 'D',
             'cc' => 'N',
             'c' => 'N',
-            'a' => 'a',
+            'a' => 'A',
             'hh' => 'h',
             'h' => 'g',
             'HH' => 'H',
@@ -77,6 +71,12 @@ class PatternParser
 
     private $exceptions =
         [
+            'GGGGG',
+            'GGGGG',
+            'GGGG',
+            'GGG',
+            'GG',
+            'G',
             'u',
             'U',
             'r',
@@ -166,6 +166,7 @@ public function setPattern($pattern)
     public function format()
     {
         $string = $this->pattern;
+        $date = '';
 
         if (preg_match('/\'(?<match>[^\']+)\'(?<date>[^\'.]+)/uism', $string, $found)) {
             $string = $this->escapeString($found['match']);
@@ -188,7 +189,7 @@ public function escapeString($string)
     {
         $escape = '\\';
         $chars = str_split($string);
-        return $escape . implode($escape, $chars);;
+        return $escape . implode($escape, $chars);
     }
 
     /**
@@ -200,8 +201,10 @@ protected function parse($string)
         $matched = [];
 
         foreach ($this->exceptions as $exception) {
-            if (strpos($string, $exception)) {
-                throw new \Exception('This library does not implement these charecters, install intl extention to use http://php.net/manual/en/book.intl.php');
+            $pos = strpos($string, $exception);
+            if ($pos !== false) {
+                throw new \Exception("This library does not implement the $exception sybmol, install intl extention to use http://php.net/manual/en/book.intl.php");
+                break;
             }
         }