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<?php
/**
* @version $Id: string.php 14401 2010-01-26 14:10:00Z louis $
* @package Joomla.Framework
* @subpackage Utilities
* @copyright Copyright (C) 2005 - 2010 Open Source Matters. All rights reserved.
* @license GNU/GPL, see LICENSE.php
* Joomla! is free software. This version may have been modified pursuant
* to the GNU General Public License, and as distributed it includes or
* is derivative of works licensed under the GNU General Public License or
* other free or open source software licenses.
* See COPYRIGHT.php for copyright notices and details.
*/
// Check to ensure this file is within the rest of the framework
defined('JPATH_BASE') or die();
/**
* PHP mbstring and iconv local configuration
*/
// check if mbstring extension is loaded and attempt to load it if not present except for windows
if (extension_loaded('mbstring') || ((!strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' && dl('mbstring.so')))) {
//Make sure to surpress the output in case ini_set is disabled
@ini_set('mbstring.internal_encoding', 'UTF-8');
@ini_set('mbstring.http_input', 'UTF-8');
@ini_set('mbstring.http_output', 'UTF-8');
}
// same for iconv
if (function_exists('iconv') || ((!strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' && dl('iconv.so')))) {
// these are settings that can be set inside code
iconv_set_encoding("internal_encoding", "UTF-8");
iconv_set_encoding("input_encoding", "UTF-8");
iconv_set_encoding("output_encoding", "UTF-8");
}
/**
* Include the utf8 package
*/
require_once(JPATH_LIBRARIES.DS.'phputf8'.DS.'utf8.php');
/**
* String handling class for utf-8 data
* Wraps the phputf8 library
* All functions assume the validity of utf-8 strings.
*
* @static
* @package Joomla.Framework
* @subpackage Utilities
* @since 1.5
*/
class JString
{
/**
* UTF-8 aware alternative to strpos
* Find position of first occurrence of a string
*
* @static
* @access public
* @param $str - string String being examined
* @param $search - string String being searced for
* @param $offset - int Optional, specifies the position from which the search should be performed
* @return mixed Number of characters before the first match or FALSE on failure
* @see http://www.php.net/strpos
*/
function strpos($str, $search, $offset = FALSE)
{
if ( $offset === FALSE ) {
return utf8_strpos($str, $search);
} else {
return utf8_strpos($str, $search, $offset);
}
}
/**
* UTF-8 aware alternative to strrpos
* Finds position of last occurrence of a string
*
* @static
* @access public
* @param $str - string String being examined
* @param $search - string String being searced for
* @return mixed Number of characters before the last match or FALSE on failure
* @see http://www.php.net/strrpos
*/
function strrpos($str, $search){
return utf8_strrpos($str, $search);
}
/**
* UTF-8 aware alternative to substr
* Return part of a string given character offset (and optionally length)
*
* @static
* @access public
* @param string
* @param integer number of UTF-8 characters offset (from left)
* @param integer (optional) length in UTF-8 characters from offset
* @return mixed string or FALSE if failure
* @see http://www.php.net/substr
*/
function substr($str, $offset, $length = FALSE)
{
if ( $length === FALSE ) {
return utf8_substr($str, $offset);
} else {
return utf8_substr($str, $offset, $length);
}
}
/**
* UTF-8 aware alternative to strtlower
* Make a string lowercase
* Note: The concept of a characters "case" only exists is some alphabets
* such as Latin, Greek, Cyrillic, Armenian and archaic Georgian - it does
* not exist in the Chinese alphabet, for example. See Unicode Standard
* Annex #21: Case Mappings
*
* @access public
* @param string
* @return mixed either string in lowercase or FALSE is UTF-8 invalid
* @see http://www.php.net/strtolower
*/
function strtolower($str){
return utf8_strtolower($str);
}
/**
* UTF-8 aware alternative to strtoupper
* Make a string uppercase
* Note: The concept of a characters "case" only exists is some alphabets
* such as Latin, Greek, Cyrillic, Armenian and archaic Georgian - it does
* not exist in the Chinese alphabet, for example. See Unicode Standard
* Annex #21: Case Mappings
*
* @access public
* @param string
* @return mixed either string in uppercase or FALSE is UTF-8 invalid
* @see http://www.php.net/strtoupper
*/
function strtoupper($str){
return utf8_strtoupper($str);
}
/**
* UTF-8 aware alternative to strlen
* Returns the number of characters in the string (NOT THE NUMBER OF BYTES),
*
* @access public
* @param string UTF-8 string
* @return int number of UTF-8 characters in string
* @see http://www.php.net/strlen
*/
function strlen($str){
return utf8_strlen($str);
}
/**
* UTF-8 aware alternative to str_ireplace
* Case-insensitive version of str_replace
*
* @static
* @access public
* @param string string to search
* @param string existing string to replace
* @param string new string to replace with
* @param int optional count value to be passed by referene
* @see http://www.php.net/str_ireplace
*/
function str_ireplace($search, $replace, $str, $count = NULL)
{
jimport('phputf8.str_ireplace');
if ( $count === FALSE ) {
return utf8_ireplace($search, $replace, $str);
} else {
return utf8_ireplace($search, $replace, $str, $count);
}
}
/**
* UTF-8 aware alternative to str_split
* Convert a string to an array
*
* @static
* @access public
* @param string UTF-8 encoded
* @param int number to characters to split string by
* @return array
* @see http://www.php.net/str_split
*/
function str_split($str, $split_len = 1)
{
jimport('phputf8.str_split');
return utf8_str_split($str, $split_len);
}
/**
* UTF-8 aware alternative to strcasecmp
* A case insensivite string comparison
*
* @static
* @access public
* @param string string 1 to compare
* @param string string 2 to compare
* @return int < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal.
* @see http://www.php.net/strcasecmp
*/
function strcasecmp($str1, $str2)
{
jimport('phputf8.strcasecmp');
return utf8_strcasecmp($str1, $str2);
}
/**
* UTF-8 aware alternative to strcspn
* Find length of initial segment not matching mask
*
* @static
* @access public
* @param string
* @param string the mask
* @param int Optional starting character position (in characters)
* @param int Optional length
* @return int the length of the initial segment of str1 which does not contain any of the characters in str2
* @see http://www.php.net/strcspn
*/
function strcspn($str, $mask, $start = NULL, $length = NULL)
{
jimport('phputf8.strcspn');
if ( $start === FALSE && $length === FALSE ) {
return utf8_strcspn($str, $mask);
} else if ( $length === FALSE ) {
return utf8_strcspn($str, $mask, $start);
} else {
return utf8_strcspn($str, $mask, $start, $length);
}
}
/**
* UTF-8 aware alternative to stristr
* Returns all of haystack from the first occurrence of needle to the end.
* needle and haystack are examined in a case-insensitive manner
* Find first occurrence of a string using case insensitive comparison
*
* @static
* @access public
* @param string the haystack
* @param string the needle
* @return string the sub string
* @see http://www.php.net/stristr
*/
function stristr($str, $search)
{
jimport('phputf8.stristr');
return utf8_stristr($str, $search);
}
/**
* UTF-8 aware alternative to strrev
* Reverse a string
*
* @static
* @access public
* @param string String to be reversed
* @return string The string in reverse character order
* @see http://www.php.net/strrev
*/
function strrev($str)
{
jimport('phputf8.strrev');
return utf8_strrev($str);
}
/**
* UTF-8 aware alternative to strspn
* Find length of initial segment matching mask
*
* @static
* @access public
* @param string the haystack
* @param string the mask
* @param int start optional
* @param int length optional
* @see http://www.php.net/strspn
*/
function strspn($str, $mask, $start = NULL, $length = NULL)
{
jimport('phputf8.strspn');
if ( $start === FALSE && $length === FALSE ) {
return utf8_strspn($str, $mask);
} else if ( $length === FALSE ) {
return utf8_strspn($str, $mask, $start);
} else {
return utf8_strspn($str, $mask, $start, $length);
}
}
/**
* UTF-8 aware substr_replace
* Replace text within a portion of a string
*
* @static
* @access public
* @param string the haystack
* @param string the replacement string
* @param int start
* @param int length (optional)
* @see http://www.php.net/substr_replace
*/
function substr_replace($str, $repl, $start, $length = NULL )
{
// loaded by library loader
if ( $length === FALSE ) {
return utf8_substr_replace($str, $repl, $start);
} else {
return utf8_substr_replace($str, $repl, $start, $length);
}
}
/**
* UTF-8 aware replacement for ltrim()
* Strip whitespace (or other characters) from the beginning of a string
* Note: you only need to use this if you are supplying the charlist
* optional arg and it contains UTF-8 characters. Otherwise ltrim will
* work normally on a UTF-8 string
*
* @static
* @access public
* @param string the string to be trimmed
* @param string the optional charlist of additional characters to trim
* @return string the trimmed string
* @see http://www.php.net/ltrim
*/
function ltrim( $str, $charlist = FALSE )
{
jimport('phputf8.trim');
if ( $charlist === FALSE ) {
return utf8_ltrim( $str );
} else {
return utf8_ltrim( $str, $charlist );
}
}
/**
* UTF-8 aware replacement for rtrim()
* Strip whitespace (or other characters) from the end of a string
* Note: you only need to use this if you are supplying the charlist
* optional arg and it contains UTF-8 characters. Otherwise rtrim will
* work normally on a UTF-8 string
*
* @static
* @access public
* @param string the string to be trimmed
* @param string the optional charlist of additional characters to trim
* @return string the trimmed string
* @see http://www.php.net/rtrim
*/
function rtrim( $str, $charlist = FALSE )
{
jimport('phputf8.trim');
if ( $charlist === FALSE ) {
return utf8_rtrim($str);
} else {
return utf8_rtrim( $str, $charlist );
}
}
/**
* UTF-8 aware replacement for trim()
* Strip whitespace (or other characters) from the beginning and end of a string
* Note: you only need to use this if you are supplying the charlist
* optional arg and it contains UTF-8 characters. Otherwise trim will
* work normally on a UTF-8 string
*
* @static
* @access public
* @param string the string to be trimmed
* @param string the optional charlist of additional characters to trim
* @return string the trimmed string
* @see http://www.php.net/trim
*/
function trim( $str, $charlist = FALSE )
{
jimport('phputf8.trim');
if ( $charlist === FALSE ) {
return utf8_trim( $str );
} else {
return utf8_trim( $str, $charlist );
}
}
/**
* UTF-8 aware alternative to ucfirst
* Make a string's first character uppercase
*
* @static
* @access public
* @param string
* @return string with first character as upper case (if applicable)
* @see http://www.php.net/ucfirst
*/
function ucfirst($str)
{
jimport('phputf8.ucfirst');
return utf8_ucfirst($str);
}
/**
* UTF-8 aware alternative to ucwords
* Uppercase the first character of each word in a string
*
* @static
* @access public
* @param string
* @return string with first char of each word uppercase
* @see http://www.php.net/ucwords
*/
function ucwords($str)
{
jimport('phputf8.ucwords');
return utf8_ucwords($str);
}
/**
* Transcode a string.
*
* @static
* @param string $source The string to transcode.
* @param string $from_encoding The source encoding.
* @param string $to_encoding The target encoding.
* @return string Transcoded string
* @since 1.5
*/
function transcode($source, $from_encoding, $to_encoding) {
if (is_string($source)) {
/*
* "//TRANSLIT" is appendd to the $to_encoding to ensure that when iconv comes
* across a character that cannot be represented in the target charset, it can
* be approximated through one or several similarly looking characters.
*/
return iconv($from_encoding, $to_encoding.'//TRANSLIT', $source);
}
}
}