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Viewing changes to codeigniter/system/core/Utf8.php

  • Committer: galaxyAbstractor
  • Date: 2013-04-10 15:58:59 UTC
  • mfrom: (20.1.1 lenasys)
  • mto: This revision was merged to the branch mainline in revision 23.
  • Revision ID: galaxyabstractor@gmail.com-20130410155859-cih60kaz5es8savt
CodeIgniter implementation of basic CMS system

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codeigniter/system/core/Utf8.php
 
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<?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
 
149
         *
 
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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 */
 
 
b'\\ No newline at end of file'