CodeIgniter installed

[living-lab-site.git] / system / core / Utf8.php

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