1 files changed, 115 insertions, 0 deletions
diff --git a/lib/Zend/Filter/Alpha.php b/lib/Zend/Filter/Alpha.php
new file mode 100644
index 0000000..adfaafe
--- /dev/null
+++ b/lib/Zend/Filter/Alpha.php
@@ -0,0 +1,115 @@
+<?php
+
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Filter
+ * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Alpha.php 12751 2008-11-21 18:30:48Z yoshida@zend.co.jp $
+ */
+
+
+/**
+ * @see Zend_Filter_Interface
+ */
+require_once 'Zend/Filter/Interface.php';
+/**
+ * @see Zend_Locale
+ */
+require_once 'Zend/Locale.php';
+
+/**
+ * @category   Zend
+ * @package    Zend_Filter
+ * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Filter_Alpha implements Zend_Filter_Interface
+{
+    /**
+     * Whether to allow white space characters; off by default
+     *
+     * @var boolean
+     */
+    public $allowWhiteSpace;
+
+    /**
+     * Is PCRE is compiled with UTF-8 and Unicode support
+     *
+     * @var mixed
+     **/
+    protected static $_unicodeEnabled;
+
+    /**
+     * Locale in browser.
+     *
+     * @var Zend_Locale object
+     */
+    protected $_locale;
+
+    /**
+     * The Alphabet means english alphabet.
+     *
+     * @var boolean
+     */
+    protected static $_meansEnglishAlphabet;
+
+    /**
+     * Sets default option values for this instance
+     *
+     * @param  boolean $allowWhiteSpace
+     * @return void
+     */
+    public function __construct($allowWhiteSpace = false)
+    {
+        $this->allowWhiteSpace = (boolean) $allowWhiteSpace;
+        if (null === self::$_unicodeEnabled) {
+            self::$_unicodeEnabled = (@preg_match('/\pL/u', 'a')) ? true : false;
+        }
+
+        if (null === self::$_meansEnglishAlphabet) {
+            $this->_locale = new Zend_Locale('auto');
+            self::$_meansEnglishAlphabet = in_array($this->_locale->getLanguage(),
+                                                    array('ja', 'ko', 'zh')
+                                                    );
+        }
+
+    }
+
+    /**
+     * Defined by Zend_Filter_Interface
+     *
+     * Returns the string $value, removing all but alphabetic characters
+     *
+     * @param  string $value
+     * @return string
+     */
+    public function filter($value)
+    {
+        $whiteSpace = $this->allowWhiteSpace ? '\s' : '';
+        if (!self::$_unicodeEnabled) {
+            // POSIX named classes are not supported, use alternative a-zA-Z match
+            $pattern = '/[^a-zA-Z' . $whiteSpace . ']/';
+        } else if (self::$_meansEnglishAlphabet) {
+            //The Alphabet means english alphabet.
+            $pattern = '/[^a-zA-Z'  . $whiteSpace . ']/u';
+        } else {
+            //The Alphabet means each language's alphabet.
+            $pattern = '/[^\p{L}' . $whiteSpace . ']/u';
+        }
+
+        return preg_replace($pattern, '', (string) $value);
+    }
+}