library/Zend/Validate/Digits.php

   1 <?php
   2 /**
   3  * Zend Framework
   4  *
   5  * LICENSE
   6  *
   7  * This source file is subject to the new BSD license that is bundled
   8  * with this package in the file LICENSE.txt.
   9  * It is also available through the world-wide-web at this URL:
  10  * http://framework.zend.com/license/new-bsd
  11  * If you did not receive a copy of the license and are unable to
  12  * obtain it through the world-wide-web, please send an email
  13  * to license@zend.com so we can send you a copy immediately.
  14  *
  15  * @category   Zend
  16  * @package    Zend_Validate
  17  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
  18  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  19  * @version    $Id$
  20  */
  21
  22 /**
  23  * @see Zend_Validate_Abstract
  24  */
  25 require_once 'Zend/Validate/Abstract.php';
  26
  27 /**
  28  * @category   Zend
  29  * @package    Zend_Validate
  30  * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
  31  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  32  */
  33 class Zend_Validate_Digits extends Zend_Validate_Abstract
  34 {
  35     const NOT_DIGITS   = 'notDigits';
  36     const STRING_EMPTY = 'digitsStringEmpty';
  37     const INVALID      = 'digitsInvalid';
  38
  39     /**
  40      * Digits filter used for validation
  41      *
  42      * @var Zend_Filter_Digits
  43      */
  44     protected static $_filter = null;
  45
  46     /**
  47      * Validation failure message template definitions
  48      *
  49      * @var array
  50      */
  51     protected $_messageTemplates = array(
  52         self::NOT_DIGITS   => "'%value%' contains characters which are not digits; but only digits are allowed",
  53         self::STRING_EMPTY => "'%value%' is an empty string",
  54         self::INVALID      => "Invalid type given, value should be string, integer or float",
  55     );
  56
  57     /**
  58      * Defined by Zend_Validate_Interface
  59      *
  60      * Returns true if and only if $value only contains digit characters
  61      *
  62      * @param  string $value
  63      * @return boolean
  64      */
  65     public function isValid($value)
  66     {
  67         if (!is_string($value) && !is_int($value) && !is_float($value)) {
  68             $this->_error(self::INVALID);
  69             return false;
  70         }
  71
  72         $this->_setValue((string) $value);
  73
  74         if ('' === $this->_value) {
  75             $this->_error(self::STRING_EMPTY);
  76             return false;
  77         }
  78
  79         if (null === self::$_filter) {
  80             require_once 'Zend/Filter/Digits.php';
  81             self::$_filter = new Zend_Filter_Digits();
  82         }
  83
  84         if ($this->_value !== self::$_filter->filter($this->_value)) {
  85             $this->_error(self::NOT_DIGITS);
  86             return false;
  87         }
  88
  89         return true;
  90     }
  91 }