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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_View
  * @subpackage Helper
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  * @version    $Id$
  */
 
 
 /**
  * Abstract class for extension
  */
 // require_once 'Zend/View/Helper/FormElement.php';
 
 
 /**
  * Helper to generate a "checkbox" element
  *
  * @category   Zend
  * @package    Zend_View
  * @subpackage Helper
  * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
 class Zend_View_Helper_FormCheckbox extends Zend_View_Helper_FormElement
 {
     /**
      * Default checked/unchecked options
      * @var array
      */
     protected static $_defaultCheckedOptions = array(
         'checkedValue'   => '1',
         'uncheckedValue' => '0'
     );
 
     /**
      * Generates a 'checkbox' element.
      *
      * @access public
      *
      * @param string|array $name If a string, the element name.  If an
      * array, all other parameters are ignored, and the array elements
      * are extracted in place of added parameters.
      * @param mixed $value The element value.
      * @param array $attribs Attributes for the element tag.
      * @return string The element XHTML.
      */
     public function formCheckbox($name, $value = null, $attribs = null, array $checkedOptions = null)
     {
         $info = $this->_getInfo($name, $value, $attribs);
         extract($info); // name, id, value, attribs, options, listsep, disable
 
         $checked = false;
         if (isset($attribs['checked']) && $attribs['checked']) {
             $checked = true;
             unset($attribs['checked']);
         } elseif (isset($attribs['checked'])) {
             $checked = false;
             unset($attribs['checked']);
         }
 
         $checkedOptions = self::determineCheckboxInfo($value, $checked, $checkedOptions);
 
         // is the element disabled?
         $disabled = '';
         if ($disable) {
             $disabled = ' disabled="disabled"';
         }
 
         // build the element
         $xhtml = '';
         if ((!$disable && !strstr($name, '[]'))
             && (empty($attribs['disableHidden']) || !$attribs['disableHidden'])
         ) {
             $xhtml = $this->_hidden($name, $checkedOptions['uncheckedValue']);
         }
 
         if (array_key_exists('disableHidden', $attribs)) {
             unset($attribs['disableHidden']);
         }
 
         $xhtml .= '<input type="checkbox"'
                 . ' name="' . $this->view->escape($name) . '"'
                 . ' id="' . $this->view->escape($id) . '"'
                 . ' value="' . $this->view->escape($checkedOptions['checkedValue']) . '"'
                 . $checkedOptions['checkedString']
                 . $disabled
                 . $this->_htmlAttribs($attribs)
                 . $this->getClosingBracket();
 
         return $xhtml;
     }
 
     /**
      * Determine checkbox information
      *
      * @param  string $value
      * @param  bool $checked
      * @param  array|null $checkedOptions
      * @return array
      */
     public static function determineCheckboxInfo($value, $checked, array $checkedOptions = null)
     {
         // Checked/unchecked values
         $checkedValue   = null;
         $uncheckedValue = null;
         if (is_array($checkedOptions)) {
             if (array_key_exists('checkedValue', $checkedOptions)) {
                 $checkedValue = (string) $checkedOptions['checkedValue'];
                 unset($checkedOptions['checkedValue']);
             }
             if (array_key_exists('uncheckedValue', $checkedOptions)) {
                 $uncheckedValue = (string) $checkedOptions['uncheckedValue'];
                 unset($checkedOptions['uncheckedValue']);
             }
             if (null === $checkedValue) {
                 $checkedValue = (string) array_shift($checkedOptions);
             }
             if (null === $uncheckedValue) {
                 $uncheckedValue = (string) array_shift($checkedOptions);
             }
         } elseif ($value !== null) {
             $uncheckedValue = self::$_defaultCheckedOptions['uncheckedValue'];
         } else {
             $checkedValue   = self::$_defaultCheckedOptions['checkedValue'];
             $uncheckedValue = self::$_defaultCheckedOptions['uncheckedValue'];
         }
 
         // is the element checked?
         $checkedString = '';
         if ($checked || ((string) $value === $checkedValue)) {
             $checkedString = ' checked="checked"';
             $checked = true;
         } else {
             $checked = false;
         }
 
         // Checked value should be value if no checked options provided
         if ($checkedValue == null) {
             $checkedValue = $value;
         }
 
         return array(
             'checked'        => $checked,
             'checkedString'  => $checkedString,
             'checkedValue'   => $checkedValue,
             'uncheckedValue' => $uncheckedValue,
         );
     }
 }