/usr/share/php/kohana3.1/system/classes/kohana/utf8.php is in libkohana3.1-core-php 3.1.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/**
* A port of [phputf8](http://phputf8.sourceforge.net/) to a unified set
* of files. Provides multi-byte aware replacement string functions.
*
* For UTF-8 support to work correctly, the following requirements must be met:
*
* - PCRE needs to be compiled with UTF-8 support (--enable-utf8)
* - Support for [Unicode properties](http://php.net/manual/reference.pcre.pattern.modifiers.php)
* is highly recommended (--enable-unicode-properties)
* - UTF-8 conversion will be much more reliable if the
* [iconv extension](http://php.net/iconv) is loaded
* - The [mbstring extension](http://php.net/mbstring) is highly recommended,
* but must not be overloading string functions
*
* [!!] This file is licensed differently from the rest of Kohana. As a port of
* [phputf8](http://phputf8.sourceforge.net/), this file is released under the LGPL.
*
* @package Kohana
* @category Base
* @author Kohana Team
* @copyright (c) 2007-2011 Kohana Team
* @copyright (c) 2005 Harry Fuecks
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
*/
class Kohana_UTF8 {
/**
* @var boolean Does the server support UTF-8 natively?
*/
public static $server_utf8 = NULL;
/**
* @var array List of called methods that have had their required file included.
*/
public static $called = array();
/**
* Recursively cleans arrays, objects, and strings. Removes ASCII control
* codes and converts to the requested charset while silently discarding
* incompatible characters.
*
* UTF8::clean($_GET); // Clean GET data
*
* [!!] This method requires [Iconv](http://php.net/iconv)
*
* @param mixed variable to clean
* @param string character set, defaults to Kohana::$charset
* @return mixed
* @uses UTF8::strip_ascii_ctrl
* @uses UTF8::is_ascii
*/
public static function clean($var, $charset = NULL)
{
if ( ! $charset)
{
// Use the application character set
$charset = Kohana::$charset;
}
if (is_array($var) OR is_object($var))
{
foreach ($var as $key => $val)
{
// Recursion!
$var[self::clean($key)] = self::clean($val);
}
}
elseif (is_string($var) AND $var !== '')
{
// Remove control characters
$var = self::strip_ascii_ctrl($var);
if ( ! self::is_ascii($var))
{
// Disable notices
$error_reporting = error_reporting(~E_NOTICE);
// iconv is expensive, so it is only used when needed
$var = iconv($charset, $charset.'//IGNORE', $var);
// Turn notices back on
error_reporting($error_reporting);
}
}
return $var;
}
/**
* Tests whether a string contains only 7-bit ASCII bytes. This is used to
* determine when to use native functions or UTF-8 functions.
*
* $ascii = UTF8::is_ascii($str);
*
* @param mixed string or array of strings to check
* @return boolean
*/
public static function is_ascii($str)
{
if (is_array($str))
{
$str = implode($str);
}
return ! preg_match('/[^\x00-\x7F]/S', $str);
}
/**
* Strips out device control codes in the ASCII range.
*
* $str = UTF8::strip_ascii_ctrl($str);
*
* @param string string to clean
* @return string
*/
public static function strip_ascii_ctrl($str)
{
return preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S', '', $str);
}
/**
* Strips out all non-7bit ASCII bytes.
*
* $str = UTF8::strip_non_ascii($str);
*
* @param string string to clean
* @return string
*/
public static function strip_non_ascii($str)
{
return preg_replace('/[^\x00-\x7F]+/S', '', $str);
}
/**
* Replaces special/accented UTF-8 characters by ASCII-7 "equivalents".
*
* $ascii = UTF8::transliterate_to_ascii($utf8);
*
* @author Andreas Gohr <andi@splitbrain.org>
* @param string string to transliterate
* @param integer -1 lowercase only, +1 uppercase only, 0 both cases
* @return string
*/
public static function transliterate_to_ascii($str, $case = 0)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _transliterate_to_ascii($str, $case);
}
/**
* Returns the length of the given string. This is a UTF8-aware version
* of [strlen](http://php.net/strlen).
*
* $length = UTF8::strlen($str);
*
* @param string string being measured for length
* @return integer
* @uses UTF8::$server_utf8
*/
public static function strlen($str)
{
if (UTF8::$server_utf8)
return mb_strlen($str, Kohana::$charset);
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _strlen($str);
}
/**
* Finds position of first occurrence of a UTF-8 string. This is a
* UTF8-aware version of [strpos](http://php.net/strpos).
*
* $position = UTF8::strpos($str, $search);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string haystack
* @param string needle
* @param integer offset from which character in haystack to start searching
* @return integer position of needle
* @return boolean FALSE if the needle is not found
* @uses UTF8::$server_utf8
*/
public static function strpos($str, $search, $offset = 0)
{
if (UTF8::$server_utf8)
return mb_strpos($str, $search, $offset, Kohana::$charset);
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _strpos($str, $search, $offset);
}
/**
* Finds position of last occurrence of a char in a UTF-8 string. This is
* a UTF8-aware version of [strrpos](http://php.net/strrpos).
*
* $position = UTF8::strrpos($str, $search);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string haystack
* @param string needle
* @param integer offset from which character in haystack to start searching
* @return integer position of needle
* @return boolean FALSE if the needle is not found
* @uses UTF8::$server_utf8
*/
public static function strrpos($str, $search, $offset = 0)
{
if (UTF8::$server_utf8)
return mb_strrpos($str, $search, $offset, Kohana::$charset);
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _strrpos($str, $search, $offset);
}
/**
* Returns part of a UTF-8 string. This is a UTF8-aware version
* of [substr](http://php.net/substr).
*
* $sub = UTF8::substr($str, $offset);
*
* @author Chris Smith <chris@jalakai.co.uk>
* @param string input string
* @param integer offset
* @param integer length limit
* @return string
* @uses UTF8::$server_utf8
* @uses Kohana::$charset
*/
public static function substr($str, $offset, $length = NULL)
{
if (UTF8::$server_utf8)
return ($length === NULL)
? mb_substr($str, $offset, mb_strlen($str), Kohana::$charset)
: mb_substr($str, $offset, $length, Kohana::$charset);
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _substr($str, $offset, $length);
}
/**
* Replaces text within a portion of a UTF-8 string. This is a UTF8-aware
* version of [substr_replace](http://php.net/substr_replace).
*
* $str = UTF8::substr_replace($str, $replacement, $offset);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string input string
* @param string replacement string
* @param integer offset
* @return string
*/
public static function substr_replace($str, $replacement, $offset, $length = NULL)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _substr_replace($str, $replacement, $offset, $length);
}
/**
* Makes a UTF-8 string lowercase. This is a UTF8-aware version
* of [strtolower](http://php.net/strtolower).
*
* $str = UTF8::strtolower($str);
*
* @author Andreas Gohr <andi@splitbrain.org>
* @param string mixed case string
* @return string
* @uses UTF8::$server_utf8
*/
public static function strtolower($str)
{
if (UTF8::$server_utf8)
return mb_strtolower($str, Kohana::$charset);
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _strtolower($str);
}
/**
* Makes a UTF-8 string uppercase. This is a UTF8-aware version
* of [strtoupper](http://php.net/strtoupper).
*
* @author Andreas Gohr <andi@splitbrain.org>
* @param string mixed case string
* @return string
* @uses UTF8::$server_utf8
* @uses Kohana::$charset
*/
public static function strtoupper($str)
{
if (UTF8::$server_utf8)
return mb_strtoupper($str, Kohana::$charset);
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _strtoupper($str);
}
/**
* Makes a UTF-8 string's first character uppercase. This is a UTF8-aware
* version of [ucfirst](http://php.net/ucfirst).
*
* $str = UTF8::ucfirst($str);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string mixed case string
* @return string
*/
public static function ucfirst($str)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _ucfirst($str);
}
/**
* Makes the first character of every word in a UTF-8 string uppercase.
* This is a UTF8-aware version of [ucwords](http://php.net/ucwords).
*
* $str = UTF8::ucwords($str);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string mixed case string
* @return string
* @uses UTF8::$server_utf8
*/
public static function ucwords($str)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _ucwords($str);
}
/**
* Case-insensitive UTF-8 string comparison. This is a UTF8-aware version
* of [strcasecmp](http://php.net/strcasecmp).
*
* $compare = UTF8::strcasecmp($str1, $str2);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string string to compare
* @param string string to compare
* @return integer less than 0 if str1 is less than str2
* @return integer greater than 0 if str1 is greater than str2
* @return integer 0 if they are equal
*/
public static function strcasecmp($str1, $str2)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _strcasecmp($str1, $str2);
}
/**
* Returns a string or an array with all occurrences of search in subject
* (ignoring case) and replaced with the given replace value. This is a
* UTF8-aware version of [str_ireplace](http://php.net/str_ireplace).
*
* [!!] This function is very slow compared to the native version. Avoid
* using it when possible.
*
* @author Harry Fuecks <hfuecks@gmail.com
* @param string|array text to replace
* @param string|array replacement text
* @param string|array subject text
* @param integer number of matched and replaced needles will be returned via this parameter which is passed by reference
* @return string if the input was a string
* @return array if the input was an array
*/
public static function str_ireplace($search, $replace, $str, & $count = NULL)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _str_ireplace($search, $replace, $str, $count);
}
/**
* Case-insenstive UTF-8 version of strstr. Returns all of input string
* from the first occurrence of needle to the end. This is a UTF8-aware
* version of [stristr](http://php.net/stristr).
*
* $found = UTF8::stristr($str, $search);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string input string
* @param string needle
* @return string matched substring if found
* @return FALSE if the substring was not found
*/
public static function stristr($str, $search)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _stristr($str, $search);
}
/**
* Finds the length of the initial segment matching mask. This is a
* UTF8-aware version of [strspn](http://php.net/strspn).
*
* $found = UTF8::strspn($str, $mask);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string input string
* @param string mask for search
* @param integer start position of the string to examine
* @param integer length of the string to examine
* @return integer length of the initial segment that contains characters in the mask
*/
public static function strspn($str, $mask, $offset = NULL, $length = NULL)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _strspn($str, $mask, $offset, $length);
}
/**
* Finds the length of the initial segment not matching mask. This is a
* UTF8-aware version of [strcspn](http://php.net/strcspn).
*
* $found = UTF8::strcspn($str, $mask);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string input string
* @param string mask for search
* @param integer start position of the string to examine
* @param integer length of the string to examine
* @return integer length of the initial segment that contains characters not in the mask
*/
public static function strcspn($str, $mask, $offset = NULL, $length = NULL)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _strcspn($str, $mask, $offset, $length);
}
/**
* Pads a UTF-8 string to a certain length with another string. This is a
* UTF8-aware version of [str_pad](http://php.net/str_pad).
*
* $str = UTF8::str_pad($str, $length);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string input string
* @param integer desired string length after padding
* @param string string to use as padding
* @param string padding type: STR_PAD_RIGHT, STR_PAD_LEFT, or STR_PAD_BOTH
* @return string
*/
public static function str_pad($str, $final_str_length, $pad_str = ' ', $pad_type = STR_PAD_RIGHT)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _str_pad($str, $final_str_length, $pad_str, $pad_type);
}
/**
* Converts a UTF-8 string to an array. This is a UTF8-aware version of
* [str_split](http://php.net/str_split).
*
* $array = UTF8::str_split($str);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string input string
* @param integer maximum length of each chunk
* @return array
*/
public static function str_split($str, $split_length = 1)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _str_split($str, $split_length);
}
/**
* Reverses a UTF-8 string. This is a UTF8-aware version of [strrev](http://php.net/strrev).
*
* $str = UTF8::strrev($str);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string string to be reversed
* @return string
*/
public static function strrev($str)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _strrev($str);
}
/**
* Strips whitespace (or other UTF-8 characters) from the beginning and
* end of a string. This is a UTF8-aware version of [trim](http://php.net/trim).
*
* $str = UTF8::trim($str);
*
* @author Andreas Gohr <andi@splitbrain.org>
* @param string input string
* @param string string of characters to remove
* @return string
*/
public static function trim($str, $charlist = NULL)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _trim($str, $charlist);
}
/**
* Strips whitespace (or other UTF-8 characters) from the beginning of
* a string. This is a UTF8-aware version of [ltrim](http://php.net/ltrim).
*
* $str = UTF8::ltrim($str);
*
* @author Andreas Gohr <andi@splitbrain.org>
* @param string input string
* @param string string of characters to remove
* @return string
*/
public static function ltrim($str, $charlist = NULL)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _ltrim($str, $charlist);
}
/**
* Strips whitespace (or other UTF-8 characters) from the end of a string.
* This is a UTF8-aware version of [rtrim](http://php.net/rtrim).
*
* $str = UTF8::rtrim($str);
*
* @author Andreas Gohr <andi@splitbrain.org>
* @param string input string
* @param string string of characters to remove
* @return string
*/
public static function rtrim($str, $charlist = NULL)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _rtrim($str, $charlist);
}
/**
* Returns the unicode ordinal for a character. This is a UTF8-aware
* version of [ord](http://php.net/ord).
*
* $digit = UTF8::ord($character);
*
* @author Harry Fuecks <hfuecks@gmail.com>
* @param string UTF-8 encoded character
* @return integer
*/
public static function ord($chr)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _ord($chr);
}
/**
* Takes an UTF-8 string and returns an array of ints representing the Unicode characters.
* Astral planes are supported i.e. the ints in the output can be > 0xFFFF.
* Occurrences of the BOM are ignored. Surrogates are not allowed.
*
* $array = UTF8::to_unicode($str);
*
* The Original Code is Mozilla Communicator client code.
* The Initial Developer of the Original Code is Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998 the Initial Developer.
* Ported to PHP by Henri Sivonen <hsivonen@iki.fi>, see <http://hsivonen.iki.fi/php-utf8/>
* Slight modifications to fit with phputf8 library by Harry Fuecks <hfuecks@gmail.com>
*
* @param string UTF-8 encoded string
* @return array unicode code points
* @return FALSE if the string is invalid
*/
public static function to_unicode($str)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _to_unicode($str);
}
/**
* Takes an array of ints representing the Unicode characters and returns a UTF-8 string.
* Astral planes are supported i.e. the ints in the input can be > 0xFFFF.
* Occurrances of the BOM are ignored. Surrogates are not allowed.
*
* $str = UTF8::to_unicode($array);
*
* The Original Code is Mozilla Communicator client code.
* The Initial Developer of the Original Code is Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998 the Initial Developer.
* Ported to PHP by Henri Sivonen <hsivonen@iki.fi>, see http://hsivonen.iki.fi/php-utf8/
* Slight modifications to fit with phputf8 library by Harry Fuecks <hfuecks@gmail.com>.
*
* @param array unicode code points representing a string
* @return string utf8 string of characters
* @return boolean FALSE if a code point cannot be found
*/
public static function from_unicode($arr)
{
if ( ! isset(self::$called[__FUNCTION__]))
{
require SYSPATH.'utf8'.DIRECTORY_SEPARATOR.__FUNCTION__.EXT;
// Function has been called
self::$called[__FUNCTION__] = TRUE;
}
return _from_unicode($arr);
}
} // End UTF8
if (Kohana_UTF8::$server_utf8 === NULL)
{
// Determine if this server supports UTF-8 natively
Kohana_UTF8::$server_utf8 = extension_loaded('mbstring');
}
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