File Source for DefaultReadFilter.php

<?php
/**
* PHPExcel
*
* Copyright (c) 2006 - 2010 PHPExcel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* @category PHPExcel
* @package PHPExcel_Reader
* @copyright Copyright (c) 2006 - 2010 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version 1.7.3c, 2010-06-01
*/
/** PHPExcel root directory */
if (!defined('PHPEXCEL_ROOT')) {
/**
* @ignore
*/
define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../../');
require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
PHPExcel_Autoloader::Register();
PHPExcel_Shared_ZipStreamWrapper::register();
// check mbstring.func_overload
if (ini_get('mbstring.func_overload') & 2) {
throw new Exception('Multibyte function overloading in PHP must be disabled for string functions (2).');
}
}
/**
* PHPExcel_Reader_DefaultReadFilter
*
* @category PHPExcel
* @package PHPExcel_Reader
* @copyright Copyright (c) 2006 - 2010 PHPExcel (http://www.codeplex.com/PHPExcel)
*/
class PHPExcel_Reader_DefaultReadFilter implements PHPExcel_Reader_IReadFilter
{
/**
* Should this cell be read?
*
* @param $column String column index
* @param $row Row index
* @param $worksheetName Optional worksheet name
* @return boolean
*/
public function readCell($column, $row, $worksheetName = '') {
return true;
}
}

Source for file DefaultReadFilter.php