Verzeichnisstruktur phpBB-3.0.0
- Veröffentlicht
- 12.12.2007
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unicode_testing.php
001 <?php
002 //
003 // This file provides some useful functions for debugging the unicode/UTF-8 library
004 // It requires utf_tools.php to be loaded
005 //
006 die("Please read the first lines of this script for instructions on how to enable it");
007
008 if (!headers_sent())
009 {
010 header('Content-type: text/html; charset=UTF-8');
011 }
012
013 /**
014 * Converts unicode escape sequences (\u0123) into UTF-8 characters
015 *
016 * @param string A unicode sequence
017 * @return string UTF-8 representation of the given unicode sequence
018 */
019 function unicode_to_utf8($string)
020 {
021 $utf8 = '';
022 $chars = array();
023 for ($i = 0; $i < strlen($string); $i++)
024 {
025 if (isset($string[$i + 5]) && substr($string, $i, 2) == '\\u' && ctype_xdigit(substr($string, $i + 2, 4)))
026 {
027 $utf8 .= utf8_from_unicode(array(base_convert(substr($string, $i + 2, 4), 16, 10)));
028 $i += 5;
029 }
030 else
031 {
032 $utf8 .= $string[$i];
033 }
034 }
035 return $utf8;
036 }
037
038 /**
039 * Takes an array of ints representing the Unicode characters and returns
040 * a UTF-8 string.
041 *
042 * @param array $array array of unicode code points representing a string
043 * @return string UTF-8 character string
044 */
045 function utf8_from_unicode($array)
046 {
047 $str = '';
048 foreach ($array as $value)
049 {
050 $str .= utf8_chr($value);
051 }
052 return $str;
053 }
054
055 /**
056 * Converts a UTF-8 string to unicode code points
057 *
058 * @param string $text UTF-8 string
059 * @return string Unicode code points
060 */
061 function utf8_to_unicode($text)
062 {
063 return preg_replace_callback(
064 '#[\\xC2-\\xF4][\\x80-\\xBF]?[\\x80-\\xBF]?[\\x80-\\xBF]#',
065 'utf8_to_unicode_callback',
066 preg_replace_callback(
067 '#[\\x00-\\x7f]#',
068 'utf8_to_unicode_callback',
069 $text
070 )
071 );
072 }
073
074 /**
075 * Takes a UTF-8 char and replaces it with its unicode escape sequence. Attention, $m is an array
076 *
077 * @param array $m 0-based numerically indexed array passed by preg_replace_callback()
078 * @return string A unicode escape sequence
079 */
080 function utf8_to_unicode_callback($m)
081 {
082 return '\u' . str_pad(base_convert(utf8_ord($m[0]), 10, 16), 4, '0', STR_PAD_LEFT) . '';
083 }
084
085 /**
086 * A wrapper function for the normalizer which takes care of including the class if required and modifies the passed strings
087 * to be in NFKC
088 *
089 * @param mixed $strings a string or an array of strings to normalize
090 * @return mixed the normalized content, preserving array keys if array given.
091 */
092 function utf8_normalize_nfkc($strings)
093 {
094 if (empty($strings))
095 {
096 return $strings;
097 }
098
099 if (!class_exists('utf_normalizer'))
100 {
101 global $phpbb_root_path, $phpEx;
102 include($phpbb_root_path . 'includes/utf/utf_normalizer.' . $phpEx);
103 }
104
105 if (!is_array($strings))
106 {
107 utf_normalizer::nfkc($strings);
108 }
109 else if (is_array($strings))
110 {
111 foreach ($strings as $key => $string)
112 {
113 utf_normalizer::nfkc($strings[$key]);
114 }
115 }
116
117 return $strings;
118 }
119
120 ?>