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599 lines
21 KiB
599 lines
21 KiB
<?php
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/**
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* ==============================================================================
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* File: multibyte_string_functions_internal.lib.php
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* Main API extension library for Dokeos 1.8.6+ LMS,
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* contains functions for internal use only.
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* License: GNU/GPL version 2 or later (Free Software Foundation)
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* @author: Ivan Tcholakov, ivantcholakov@gmail.com, 2009
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* @package dokeos.library
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* ==============================================================================
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*/
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/**
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* ----------------------------------------------------------------------------
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* Appendix to "Multibyte string conversion functions"
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* ----------------------------------------------------------------------------
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*/
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// This is a php-implementation of the function api_convert_encoding().
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function _api_convert_encoding($string, $to_encoding, $from_encoding) {
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static $character_map = array();
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static $utf8_like = array('UTF-8', 'US-ASCII');
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static $unknown = 63; // '?'
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if (empty($string)) {
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return $string;
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}
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$to_encoding = api_refine_encoding_id($to_encoding);
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$from_encoding = api_refine_encoding_id($from_encoding);
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if (api_equal_encodings($to_encoding, $from_encoding)) {
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return $string;
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}
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$to = _api_get_character_map_name($to_encoding);
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$from = _api_get_character_map_name($from_encoding);
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if (empty($to) || empty($from) || $to == $from || (in_array($to, $utf8_like) && in_array($from, $utf8_like))) {
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return $string;
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}
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if (!isset($character_map[$to])) {
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$character_map[$to] = _api_parse_character_map($to);
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}
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if ($character_map[$to] === false) {
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return $string;
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}
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if (!isset($character_map[$from])) {
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$character_map[$from] = _api_parse_character_map($from);
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}
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if ($character_map[$from] === false) {
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return $string;
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}
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if ($from != 'UTF-8') {
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$len = api_byte_count($string);
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$codepoints = array();
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for ($i = 0; $i < $len; $i++) {
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$ord = ord($string[$i]);
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if ($ord > 127) {
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if (isset($character_map[$from]['local'][$ord])) {
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$codepoints[] = $character_map[$from]['local'][$ord];
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} else {
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$codepoints[] = $unknown;
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}
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} else {
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$codepoints[] = $ord;
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}
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}
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} else {
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$codepoints = _api_utf8_to_unicode($string);
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}
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if ($to != 'UTF-8') {
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$unknown_char = chr($unknown);
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foreach ($codepoints as $i => &$codepoint) {
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if ($codepoint > 127) {
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if (isset($character_map[$from]['local'][$codepoint])) {
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$codepoint = chr($character_map[$from]['local'][$codepoint]);
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} else {
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$codepoint = $unknown_char;
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}
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} else {
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$codepoint = chr($codepoint);
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}
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}
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$string = implode($codepoints);
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} else {
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$string = _api_utf8_from_unicode($codepoints);
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}
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return $string;
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}
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// This function determines the name of the conversion table, dealing with
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// aliases if the encoding identificator.
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function _api_get_character_map_name($encoding) {
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static $character_map_selector;
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if (!isset($character_map_selector)) {
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$file = dirname(__FILE__) . '/multibyte_string_database/conversion/character_map_selector.php';
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if (file_exists($file)) {
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$character_map_selector = include ($file);
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} else {
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$character_map_selector = array();
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}
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}
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return isset($character_map_selector[$encoding]) ? $character_map_selector[$encoding] : '';
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}
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// This function parses a given conversion table (a text file) and creates in the memory
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// two tables for conversion - character set from/to Unicode codepoints.
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function &_api_parse_character_map($name) {
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$result = array('local' => array(), 'unicode' => array());
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$file = dirname(__FILE__) . '/multibyte_string_database/conversion/' . $name . '.TXT';
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if (file_exists($file)) {
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$text = @file_get_contents($file);
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if ($text !== false) {
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$text = explode(chr(10), $text);
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foreach ($text as $line) {
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if (empty($line)) {
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continue;
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}
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if (!empty($line) && trim($line) && $line[0] != '#') {
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$matches = array();
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preg_match('/[[:space:]]*0x([[:alnum:]]*)[[:space:]]+0x([[:alnum:]]*)[[:space:]]+/', $line, $matches);
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$ord = hexdec(trim($matches[1]));
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if ($ord > 127) {
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$result['local'][$ord] = hexdec(trim($matches[2]));
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$result['unicode'][$result['local'][$ord]] = $ord;
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}
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}
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}
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} else {
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return false ;
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}
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} else {
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return false;
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}
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return $result;
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}
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// Converts UTF-8 string into htmlentities, a php-implementation.
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function _api_utf8_to_htmlentities($string) {
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$result = _api_utf8_to_unicode($string);
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foreach ($result as $key => &$value) {
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if ($value < 128) {
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$value = chr($value);
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} else {
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$value = '&#'.$value.';';
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}
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}
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return implode($result);
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}
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/**
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* ----------------------------------------------------------------------------
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* Appendix to "Common multibyte string functions"
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* ----------------------------------------------------------------------------
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*/
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/**
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* Takes an UTF-8 string and returns an array of ints representing the
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* Unicode characters. Astral planes are supported ie. the ints in the
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* output can be > 0xFFFF. Occurrances of the BOM are ignored. Surrogates
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* are not allowed.
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* @param string $string The UTF-8 encoded string.
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* @param string $unknown (optional) A US-ASCII character to represent invalid bytes.
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* @return array Returns an array of unicode code points.
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* @author Henri Sivonen, mailto:hsivonen@iki.fi
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* @link http://hsivonen.iki.fi/php-utf8/
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* @author Ivan Tcholakov, 2009, modifications for the Dokeos LMS.
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*/
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function _api_utf8_to_unicode($string, $unknown = '?') {
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if (!empty($unknown)) {
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$unknown = ord($unknown[0]);
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}
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$state = 0; // cached expected number of octets after the current octet
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// until the beginning of the next UTF8 character sequence
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$codepoint = 0; // cached Unicode character
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$bytes = 1; // cached expected number of octets in the current sequence
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$result = array();
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$len = api_byte_count($string);
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for ($i = 0; $i < $len; $i++) {
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$byte = ord($string[$i]);
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if ($state == 0) {
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// When state is zero we expect either a US-ASCII character or a
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// multi-octet sequence.
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if (0 == (0x80 & ($byte))) {
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// US-ASCII, pass straight through.
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$result[] = $byte;
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$bytes = 1;
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} else if (0xC0 == (0xE0 & ($byte))) {
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// First octet of 2 octet sequence
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$codepoint = ($byte);
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$codepoint = ($codepoint & 0x1F) << 6;
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$state = 1;
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$bytes = 2;
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} else if (0xE0 == (0xF0 & ($byte))) {
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// First octet of 3 octet sequence
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$codepoint = ($byte);
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$codepoint = ($codepoint & 0x0F) << 12;
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$state = 2;
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$bytes = 3;
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} else if (0xF0 == (0xF8 & ($byte))) {
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// First octet of 4 octet sequence
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$codepoint = ($byte);
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$codepoint = ($codepoint & 0x07) << 18;
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$state = 3;
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$bytes = 4;
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} else if (0xF8 == (0xFC & ($byte))) {
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// First octet of 5 octet sequence.
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// This is illegal because the encoded codepoint must be either
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// (a) not the shortest form or
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// (b) outside the Unicode range of 0-0x10FFFF.
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// Rather than trying to resynchronize, we will carry on until the end
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// of the sequence and let the later error handling code catch it.
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$codepoint = ($byte);
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$codepoint = ($codepoint & 0x03) << 24;
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$state = 4;
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$bytes = 5;
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} else if (0xFC == (0xFE & ($byte))) {
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// First octet of 6 octet sequence, see comments for 5 octet sequence.
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$codepoint = ($byte);
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$codepoint = ($codepoint & 1) << 30;
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$state = 5;
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$bytes = 6;
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} else {
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// Current octet is neither in the US-ASCII range nor a legal first
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// octet of a multi-octet sequence.
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$state = 0;
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$codepoint = 0;
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$bytes = 1;
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if (!empty($unknown)) {
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$result[] = $unknown;
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}
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continue ;
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}
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} else {
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// When state is non-zero, we expect a continuation of the multi-octet
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// sequence
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if (0x80 == (0xC0 & ($byte))) {
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// Legal continuation.
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$shift = ($state - 1) * 6;
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$tmp = $byte;
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$tmp = ($tmp & 0x0000003F) << $shift;
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$codepoint |= $tmp;
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// End of the multi-octet sequence. $codepoint now contains the final
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// Unicode codepoint to be output
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if (0 == --$state) {
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// Check for illegal sequences and codepoints.
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// From Unicode 3.1, non-shortest form is illegal
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if (((2 == $bytes) && ($codepoint < 0x0080)) ||
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((3 == $bytes) && ($codepoint < 0x0800)) ||
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((4 == $bytes) && ($codepoint < 0x10000)) ||
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(4 < $bytes) ||
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// From Unicode 3.2, surrogate characters are illegal
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(($codepoint & 0xFFFFF800) == 0xD800) ||
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// Codepoints outside the Unicode range are illegal
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($codepoint > 0x10FFFF)) {
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$state = 0;
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$codepoint = 0;
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$bytes = 1;
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if (!empty($unknown)) {
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$result[] = $unknown;
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}
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continue ;
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}
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if (0xFEFF != $codepoint) {
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// BOM is legal but we don't want to output it
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$result[] = $codepoint;
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}
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// Initialize UTF8 cache
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$state = 0;
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$codepoint = 0;
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$bytes = 1;
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}
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} else {
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// ((0xC0 & (*in) != 0x80) && (state != 0))
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// Incomplete multi-octet sequence.
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$state = 0;
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$codepoint = 0;
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$bytes = 1;
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if (!empty($unknown)) {
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$result[] = $unknown;
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}
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}
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}
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}
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return $result;
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}
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/**
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* Takes an array of ints representing the Unicode characters and returns
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* a UTF-8 string. Astral planes are supported ie. the ints in the
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* input can be > 0xFFFF. Occurrances of the BOM are ignored. Surrogates
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* are not allowed.
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* @param array $array An array of unicode code points representing a string.
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* @param string $unknown (optional) A US-ASCII character to represent invalid bytes.
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* @return string Returns a UTF-8 string constructed using the given code points.
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* @author Henri Sivonen, mailto:hsivonen@iki.fi
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* @link http://hsivonen.iki.fi/php-utf8/
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* @author Ivan Tcholakov, 2009, modifications for the Dokeos LMS.
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* @see _api_utf8_from_unicodepoint()
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*/
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function _api_utf8_from_unicode($array, $unknown = '?') {
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foreach ($array as $i => &$codepoint) {
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$codepoint = _api_utf8_from_unicodepoint($codepoint, $unknown);
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}
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return implode($array);
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}
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/**
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* Takes an integer value and returns its correspondent representing the Unicode character.
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* @param array $array An array of unicode code points representing a string
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* @param string $unknown (optional) A US-ASCII character to represent invalid bytes.
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* @return string Returns the corresponding UTF-8 character.
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* @see _api_utf8_from_unicode()
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*/
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function _api_utf8_from_unicodepoint($codepoint, $unknown = '?') {
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// ASCII range (including control chars)
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if ( ($codepoint >= 0) && ($codepoint <= 0x007f) ) {
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$result = chr($codepoint);
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// 2 byte sequence
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} else if ($codepoint <= 0x07ff) {
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$result = chr(0xc0 | ($codepoint >> 6)) . chr(0x80 | ($codepoint & 0x003f));
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// Byte order mark (skip)
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} else if($codepoint == 0xFEFF) {
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// nop -- zap the BOM
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$result = '';
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// Test for illegal surrogates
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} else if ($codepoint >= 0xD800 && $codepoint <= 0xDFFF) {
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// found a surrogate
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$result = $unknown;
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// 3 byte sequence
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} else if ($codepoint <= 0xffff) {
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$result = chr(0xe0 | ($codepoint >> 12)) . chr(0x80 | (($codepoint >> 6) & 0x003f)) . chr(0x80 | ($codepoint & 0x003f));
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// 4 byte sequence
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} else if ($codepoint <= 0x10ffff) {
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$result = chr(0xf0 | ($codepoint >> 18)) . chr(0x80 | (($codepoint >> 12) & 0x3f)) . chr(0x80 | (($codepoint >> 6) & 0x3f)) . chr(0x80 | ($codepoint & 0x3f));
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} else {
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// out of range
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$result = $unknown;
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}
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return $result;
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}
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// Reads case folding properties about a given character from a file-based "database".
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function _api_utf8_get_letter_case_properties($codepoint, $type = 'lower') {
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static $config = array();
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static $range = array();
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if (!isset($range[$codepoint])) {
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if ($codepoint > 128 && $codepoint < 256) {
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$range[$codepoint] = '0080_00ff'; // Latin-1 Supplement
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} elseif ($codepoint < 384) {
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$range[$codepoint] = '0100_017f'; // Latin Extended-A
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} elseif ($codepoint < 592) {
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$range[$codepoint] = '0180_024F'; // Latin Extended-B
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} elseif ($codepoint < 688) {
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$range[$codepoint] = '0250_02af'; // IPA Extensions
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} elseif ($codepoint >= 880 && $codepoint < 1024) {
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$range[$codepoint] = '0370_03ff'; // Greek and Coptic
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} elseif ($codepoint < 1280) {
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$range[$codepoint] = '0400_04ff'; // Cyrillic
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} elseif ($codepoint < 1328) {
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$range[$codepoint] = '0500_052f'; // Cyrillic Supplement
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} elseif ($codepoint < 1424) {
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$range[$codepoint] = '0530_058f'; // Armenian
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} elseif ($codepoint >= 7680 && $codepoint < 7936) {
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$range[$codepoint] = '1e00_1eff'; // Latin Extended Additional
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} elseif ($codepoint < 8192) {
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$range[$codepoint] = '1f00_1fff'; // Greek Extended
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} elseif ($codepoint >= 8448 && $codepoint < 8528) {
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$range[$codepoint] = '2100_214f'; // Letterlike Symbols
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} elseif ($codepoint < 8592) {
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$range[$codepoint] = '2150_218f'; // Number Forms
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} elseif ($codepoint >= 9312 && $codepoint < 9472) {
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$range[$codepoint] = '2460_24ff'; // Enclosed Alphanumerics
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} elseif ($codepoint >= 11264 && $codepoint < 11360) {
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$range[$codepoint] = '2c00_2c5f'; // Glagolitic
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} elseif ($codepoint < 11392) {
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$range[$codepoint] = '2c60_2c7f'; // Latin Extended-C
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} elseif ($codepoint < 11520) {
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$range[$codepoint] = '2c80_2cff'; // Coptic
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} elseif ($codepoint >= 65280 && $codepoint < 65520) {
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$range[$codepoint] = 'ff00_ffef'; // Halfwidth and Fullwidth Forms
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} else {
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$range[$codepoint] = false;
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}
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if ($range[$codepoint] === false) {
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return null;
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}
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if (!isset($config[$range[$codepoint]])) {
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$file = dirname(__FILE__) . '/multibyte_string_database/casefolding/' . $range[$codepoint] . '.php';
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if (file_exists($file)) {
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include $file;
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}
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}
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}
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if ($range[$codepoint] === false || !isset($config[$range[$codepoint]])) {
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return null;
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}
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$result = array();
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$count = count($config[$range[$codepoint]]);
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for ($i = 0; $i < $count; $i++) {
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if ($type === 'lower' && $config[$range[$codepoint]][$i][$type][0] === $codepoint) {
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$result[] = $config[$range[$codepoint]][$i];
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} elseif ($type === 'upper' && $config[$range[$codepoint]][$i][$type] === $codepoint) {
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$result[] = $config[$range[$codepoint]][$i];
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}
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}
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return $result;
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}
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/**
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* ----------------------------------------------------------------------------
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* Appendix to "Common sting operations with arrays"
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* ----------------------------------------------------------------------------
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*/
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// This (callback) function convers from UTF-8 to other encoding.
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// It works with arrays of strings too.
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function _api_array_utf8_decode($variable, $encoding) {
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if (is_array($variable)) {
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return array_map('_api_array_utf8_decode', $variable, $encoding);
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}
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if (is_string($var)) {
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return api_utf8_decode($variable, $encoding);
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}
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return $variable;
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}
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/**
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* ----------------------------------------------------------------------------
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* Appendix to "String comparison"
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* ----------------------------------------------------------------------------
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*/
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// Global variables used by the sorting functions.
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$_api_collator = null;
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$_api_encoding = null;
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// A string comparison function that serves sorting functions.
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function _api_cmp($string1, $string2) {
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global $_api_collator, $_api_encoding;
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$result = collator_compare($_api_collator, api_utf8_encode($string1, $_api_encoding), api_utf8_encode($string2, $_api_encoding));
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return $result === false ? 0 : $result;
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}
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// A reverse string comparison function that serves sorting functions.
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function _api_rcmp($string1, $string2) {
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global $_api_collator, $_api_encoding;
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$result = collator_compare($_api_collator, api_utf8_encode($string2, $_api_encoding), api_utf8_encode($string1, $_api_encoding));
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return $result === false ? 0 : $result;
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}
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// A case-insensitive string comparison function that serves sorting functions.
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function _api_casecmp($string1, $string2) {
|
|
global $_api_collator, $_api_encoding;
|
|
$result = collator_compare($_api_collator, api_strtolower(api_utf8_encode($string1, $_api_encoding), 'UTF-8'), api_strtolower(api_utf8_encode($string2, $_api_encoding), 'UTF-8'));
|
|
return $result === false ? 0 : $result;
|
|
}
|
|
|
|
// A reverse case-insensitive string comparison function that serves sorting functions.
|
|
function _api_casercmp($string1, $string2) {
|
|
global $_api_collator, $_api_encoding;
|
|
$result = collator_compare($_api_collator, api_strtolower(api_utf8_encode($string2, $_api_encoding), 'UTF-8'), api_strtolower(api_utf8_encode($string1, $_api_encoding), 'UTF-8'));
|
|
return $result === false ? 0 : $result;
|
|
}
|
|
|
|
// A reverse function from strnatcmp().
|
|
function _api_strnatrcmp($string1, $string2) {
|
|
return strnatcmp($string2, $string1);
|
|
}
|
|
|
|
// A reverse function from strnatcasecmp().
|
|
function _api_strnatcasercmp($string1, $string2) {
|
|
return strnatcasecmp($string2, $string1);
|
|
}
|
|
|
|
// A fuction that translates sorting flag constants from php core to correspondent constants from intl extension.
|
|
function _api_get_collator_sort_flag($sort_flag = SORT_REGULAR) {
|
|
switch ($sort_flag) {
|
|
case SORT_STRING:
|
|
case SORT_SORT_LOCALE_STRING:
|
|
return Collator::SORT_STRING;
|
|
case SORT_NUMERIC:
|
|
return Collator::SORT_NUMERIC;
|
|
}
|
|
return Collator::SORT_REGULAR;
|
|
}
|
|
|
|
|
|
/**
|
|
* ----------------------------------------------------------------------------
|
|
* Appendix to "Encoding management functions"
|
|
* ----------------------------------------------------------------------------
|
|
*/
|
|
|
|
// This function checks whether the function _api_convert_encoding() (the php-
|
|
// implementation) is able to convert from/to a given encoding.
|
|
function _api_convert_encoding_supports($encoding) {
|
|
static $supports = array();
|
|
if (!isset($supports[encoding])) {
|
|
$supports[encoding] = _api_get_character_map_name($encoding) != '';
|
|
}
|
|
return $supports[encoding];
|
|
}
|
|
|
|
|
|
/**
|
|
* ----------------------------------------------------------------------------
|
|
* Upgrading the PHP5 mbstring extension
|
|
* ----------------------------------------------------------------------------
|
|
*/
|
|
|
|
// This is a multibyte replacement of strchr().
|
|
// This function exists in PHP 5 >= 5.2.0
|
|
// See http://php.net/manual/en/function.mb-strrchr
|
|
if (MBSTRING_INSTALLED && !function_exists('mb_strchr')) {
|
|
function mb_strchr($haystack, $needle, $part = false, $encoding = null) {
|
|
if (empty($encoding)) {
|
|
$encoding = mb_internal_encoding();
|
|
}
|
|
return mb_strstr($haystack, $needle, $part, $encoding);
|
|
}
|
|
}
|
|
|
|
// This is a multibyte replacement of stripos().
|
|
// This function exists in PHP 5 >= 5.2.0
|
|
// See http://php.net/manual/en/function.mb-stripos
|
|
if (MBSTRING_INSTALLED && !function_exists('mb_stripos')) {
|
|
function mb_stripos($haystack, $needle, $offset = 0, $encoding = null) {
|
|
if (empty($encoding)) {
|
|
$encoding = mb_internal_encoding();
|
|
}
|
|
return mb_strpos(mb_strtolower($haystack, $encoding), mb_strtolower($needle, $encoding), $offset, $encoding);
|
|
}
|
|
}
|
|
|
|
// This is a multibyte replacement of stristr().
|
|
// This function exists in PHP 5 >= 5.2.0
|
|
// See http://php.net/manual/en/function.mb-stristr
|
|
if (MBSTRING_INSTALLED && !function_exists('mb_stristr')) {
|
|
function mb_stristr($haystack, $needle, $part = false, $encoding = null) {
|
|
if (empty($encoding)) {
|
|
$encoding = mb_internal_encoding();
|
|
}
|
|
$pos = mb_strpos(mb_strtolower($haystack, $encoding), mb_strtolower($needle, $encoding), 0, $encoding);
|
|
if ($pos === false) {
|
|
return false;
|
|
}
|
|
elseif($part == true) {
|
|
return mb_substr($haystack, 0, $pos + 1, $encoding);
|
|
} else {
|
|
return mb_substr($haystack, $pos, mb_strlen($haystack, $encoding), $encoding);
|
|
}
|
|
}
|
|
}
|
|
|
|
// This is a multibyte replacement of strrchr().
|
|
// This function exists in PHP 5 >= 5.2.0
|
|
// See http://php.net/manual/en/function.mb-strrchr
|
|
if (MBSTRING_INSTALLED && !function_exists('mb_strrchr')) {
|
|
function mb_strrchr($haystack, $needle, $part = false, $encoding = null) {
|
|
if (empty($encoding)) {
|
|
$encoding = mb_internal_encoding();
|
|
}
|
|
$needle = mb_substr($needle, 0, 1, $encoding);
|
|
$pos = mb_strrpos($haystack, $needle, mb_strlen($haystack, $encoding) - 1, $encoding);
|
|
if ($pos === false) {
|
|
return false;
|
|
} elseif($part == true) {
|
|
return mb_substr($haystack, 0, $pos + 1, $encoding);
|
|
} else {
|
|
return mb_substr($haystack, $pos, mb_strlen($haystack, $encoding), $encoding);
|
|
}
|
|
}
|
|
}
|
|
|
|
// This is a multibyte replacement of strstr().
|
|
// This function exists in PHP 5 >= 5.2.0
|
|
// See http://php.net/manual/en/function.mb-strstr
|
|
if (MBSTRING_INSTALLED && !function_exists('mb_strstr')) {
|
|
function mb_strstr($haystack, $needle, $part = false, $encoding = null) {
|
|
if (empty($encoding)) {
|
|
$encoding = mb_internal_encoding();
|
|
}
|
|
$pos = mb_strpos($haystack, $needle, 0, $encoding);
|
|
if ($pos === false) {
|
|
return false;
|
|
} elseif($part == true) {
|
|
return mb_substr($haystack, 0, $pos + 1, $encoding);
|
|
} else {
|
|
return mb_substr($haystack, $pos, mb_strlen($haystack, $encoding), $encoding);
|
|
}
|
|
}
|
|
}
|
|
|
|
?>
|