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<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.2.4 or newer
*
* NOTICE OF LICENSE
*
* Licensed under the Open Software License version 3.0
*
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
* http://opensource.org/licenses/OSL-3.0
* 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
* licensing@ellislab.com so we can send you a copy immediately.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
* @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
* @link http://codeigniter.com
* @since Version 2.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* Utf8 Class
*
* Provides support for UTF-8 environments
*
* @package CodeIgniter
* @subpackage Libraries
* @category UTF-8
* @author EllisLab Dev Team
* @link http://codeigniter.com/user_guide/libraries/utf8.html
*/
class CI_Utf8 {
/**
* Class constructor
*
* Determines if UTF-8 support is to be enabled.
*
* @return void
*/
public function __construct()
{
if (
defined('PREG_BAD_UTF8_ERROR') // PCRE must support UTF-8
&& (ICONV_ENABLED === TRUE OR MB_ENABLED === TRUE) // iconv or mbstring must be installed
&& strnatcasecmp(config_item('charset'), 'UTF-8') === 0 // Application charset must be UTF-8
)
{
define('UTF8_ENABLED', TRUE);
log_message('debug', 'UTF-8 Support Enabled');
}
else
{
define('UTF8_ENABLED', FALSE);
log_message('debug', 'UTF-8 Support Disabled');
}
log_message('debug', 'Utf8 Class Initialized');
}
// --------------------------------------------------------------------
/**
* Clean UTF-8 strings
*
* Ensures strings contain only valid UTF-8 characters.
*
* @uses CI_Utf8::_is_ascii() Decide whether a conversion is needed
*
* @param string $str String to clean
* @return string
*/
public function clean_string($str)
{
if ($this->_is_ascii($str) === FALSE)
{
if (ICONV_ENABLED)
{
$str = @iconv('UTF-8', 'UTF-8//IGNORE', $str);
}
elseif (MB_ENABLED)
{
$str = mb_convert_encoding($str, 'UTF-8', 'UTF-8');
}
}
return $str;
}
// --------------------------------------------------------------------
/**
* Remove ASCII control characters
*
* Removes all ASCII control characters except horizontal tabs,
* line feeds, and carriage returns, as all others can cause
* problems in XML.
*
* @param string $str String to clean
* @return string
*/
public function safe_ascii_for_xml($str)
{
return remove_invisible_characters($str, FALSE);
}
// --------------------------------------------------------------------
/**
* Convert to UTF-8
*
* Attempts to convert a string to UTF-8.
*
* @param string $str Input string
* @param string $encoding Input encoding
* @return string $str encoded in UTF-8 or FALSE on failure
*/
public function convert_to_utf8($str, $encoding)
{
if (ICONV_ENABLED)
{
return @iconv($encoding, 'UTF-8', $str);
}
elseif (MB_ENABLED === TRUE)
{
return @mb_convert_encoding($str, 'UTF-8', $encoding);
}
return FALSE;
}
// --------------------------------------------------------------------
/**
* Is ASCII?
*
* Tests if a string is standard 7-bit ASCII or not.
*
* @param string $str String to check
* @return bool
*/
protected function _is_ascii($str)
{
return (preg_match('/[^\x00-\x7F]/S', $str) === 0);
}
}
/* End of file Utf8.php */
/* Location: ./system/core/Utf8.php */
|
