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<?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_Validate
* @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 8064 2008-02-16 10:58:39Z thomas $
*/
/**
* @see Zend_Validate_Abstract
*/
require_once 'Zend/Validate/Abstract.php';
/**
* @category Zend
* @package Zend_Validate
* @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_Validate_Alpha extends Zend_Validate_Abstract
{
/**
* Validation failure message key for when the value contains non-alphabetic characters
*/
const NOT_ALPHA = 'notAlpha';
/**
* Validation failure message key for when the value is an empty string
*/
const STRING_EMPTY = 'stringEmpty';
/**
* Whether to allow white space characters; off by default
*
* @var boolean
*/
public $allowWhiteSpace;
/**
* Alphabetic filter used for validation
*
* @var Zend_Filter_Alpha
*/
protected static $_filter = null;
/**
* Validation failure message template definitions
*
* @var array
*/
protected $_messageTemplates = array(
self::NOT_ALPHA => "'%value%' has not only alphabetic characters",
self::STRING_EMPTY => "'%value%' is an empty string"
);
/**
* Sets default option values for this instance
*
* @param boolean $allowWhiteSpace
* @return void
*/
public function __construct($allowWhiteSpace = false)
{
$this->allowWhiteSpace = (boolean) $allowWhiteSpace;
}
/**
* Defined by Zend_Validate_Interface
*
* Returns true if and only if $value contains only alphabetic characters
*
* @param string $value
* @return boolean
*/
public function isValid($value)
{
$valueString = (string) $value;
$this->_setValue($valueString);
if ('' === $valueString) {
$this->_error(self::STRING_EMPTY);
return false;
}
if (null === self::$_filter) {
/**
* @see Zend_Filter_Alpha
*/
require_once 'Zend/Filter/Alpha.php';
self::$_filter = new Zend_Filter_Alpha();
}
self::$_filter->allowWhiteSpace = $this->allowWhiteSpace;
if ($valueString !== self::$_filter->filter($valueString)) {
$this->_error(self::NOT_ALPHA);
return false;
}
return true;
}
}
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