165 lines
3.5 KiB
PHP
165 lines
3.5 KiB
PHP
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP 5.1.6 or newer
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*
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* @package CodeIgniter
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* @author ExpressionEngine Dev Team
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
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* @license http://codeigniter.com/user_guide/license.html
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* @link http://codeigniter.com
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* @since Version 2.0
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* @filesource
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*/
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// ------------------------------------------------------------------------
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/**
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* Utf8 Class
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*
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* Provides support for UTF-8 environments
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*
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* @package CodeIgniter
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* @subpackage Libraries
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* @category UTF-8
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* @author ExpressionEngine Dev Team
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* @link http://codeigniter.com/user_guide/libraries/utf8.html
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*/
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class CI_Utf8 {
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/**
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* Constructor
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*
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* Determines if UTF-8 support is to be enabled
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*
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*/
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function __construct()
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{
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log_message('debug', "Utf8 Class Initialized");
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global $CFG;
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if (
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preg_match('/./u', 'é') === 1 // PCRE must support UTF-8
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AND function_exists('iconv') // iconv must be installed
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AND ini_get('mbstring.func_overload') != 1 // Multibyte string function overloading cannot be enabled
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AND $CFG->item('charset') == 'UTF-8' // Application charset must be UTF-8
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)
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{
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log_message('debug', "UTF-8 Support Enabled");
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define('UTF8_ENABLED', TRUE);
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// set internal encoding for multibyte string functions if necessary
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// and set a flag so we don't have to repeatedly use extension_loaded()
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// or function_exists()
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if (extension_loaded('mbstring'))
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{
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define('MB_ENABLED', TRUE);
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mb_internal_encoding('UTF-8');
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}
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else
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{
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define('MB_ENABLED', FALSE);
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}
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}
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else
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{
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log_message('debug', "UTF-8 Support Disabled");
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define('UTF8_ENABLED', FALSE);
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}
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}
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// --------------------------------------------------------------------
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/**
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* Clean UTF-8 strings
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*
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* Ensures strings are UTF-8
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*
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* @access public
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* @param string
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* @return string
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*/
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function clean_string($str)
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{
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if ($this->_is_ascii($str) === FALSE)
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{
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$str = @iconv('UTF-8', 'UTF-8//IGNORE', $str);
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}
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return $str;
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}
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// --------------------------------------------------------------------
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/**
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* Remove ASCII control characters
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*
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* Removes all ASCII control characters except horizontal tabs,
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* line feeds, and carriage returns, as all others can cause
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* problems in XML
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*
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* @access public
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* @param string
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* @return string
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*/
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function safe_ascii_for_xml($str)
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{
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return remove_invisible_characters($str, FALSE);
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}
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// --------------------------------------------------------------------
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/**
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* Convert to UTF-8
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*
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* Attempts to convert a string to UTF-8
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*
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* @access public
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* @param string
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* @param string - input encoding
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* @return string
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*/
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function convert_to_utf8($str, $encoding)
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{
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if (function_exists('iconv'))
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{
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$str = @iconv($encoding, 'UTF-8', $str);
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}
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elseif (function_exists('mb_convert_encoding'))
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{
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$str = @mb_convert_encoding($str, 'UTF-8', $encoding);
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}
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else
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{
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return FALSE;
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}
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return $str;
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}
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// --------------------------------------------------------------------
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/**
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* Is ASCII?
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*
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* Tests if a string is standard 7-bit ASCII or not
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*
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* @access public
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* @param string
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* @return bool
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*/
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function _is_ascii($str)
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{
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return (preg_match('/[^\x00-\x7F]/S', $str) == 0);
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}
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// --------------------------------------------------------------------
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}
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// End Utf8 Class
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/* End of file Utf8.php */
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/* Location: ./system/core/Utf8.php */ |