Invision Power Services, Inc. * @copyright (c) Invision Power Services, Inc. * @license https://www.invisioncommunity.com/legal/standards/ * @package IPS Tools * @since 4 Sept 2013 */ namespace IPSUtf8\Text\Module; /** * Native MB Conversion class */ class Internal extends \IPSUtf8\Text\Charset { /** * Converts a text string from its current charset to a destination charset using internal conversion class. * The bulk of this function was written by Mikolaj Jedrzejak and used with permission via the License * * @param string Text string * @param string Text string char set (original) * @param string Desired character set (destination) * @return @e string */ public function convert( $string, $from, $to='UTF-8' ) { if ( static::needsConverting( $string, $from, $to ) === false ) { /* Make sure it decodes properly - some characters such as £ can cause issues between windows-1250, windows-1252, and iso-8859-1 because they store them differently. @see http://php.net/manual/en/function.utf8-decode.php */ if ( $to == 'UTF-8' ) { if ( mb_substr_count( utf8_decode( $string ), '?' ) != mb_substr_count( $string, '?' ) ) { $string = utf8_encode( $string ); } } return $string; } $text = ''; $original = $string; $from = strtolower( $from ); $to = strtolower( $to ); if( !static::$charsetPath ) { static::$charsetPath = THIS_PATH . '/system/i18n/ConvertTables/'; } /** * This divison was made to prevent errors during convertion to/from utf-8 with * "entities" enabled, because we need to use proper destination(to)/source(from) * encoding table to write proper entities. * * This is the first case. We are converting from 1byte chars... */ if ($from != "utf-8") { /* Cache the conversion table to prevent rebuilding on every request */ static $charsetTables = array(); /** * Now build table with both charsets for encoding change. */ if( !isset( $charsetTables[ $from ] ) ) { if ($to != "utf-8") { $charsetTables[ $from ] = self::_makeConversionTable( $from, $to ); } else { $charsetTables[ $from ] = self::_makeConversionTable( $from ); } } $charsetTable = $charsetTables[ $from ]; if( !count($charsetTable) ) { static::$errors[] = "Character set table not found"; return $original; } /** * For each char in a string... */ for ($i = 0; $i < strlen($string); $i++) { $hexChar = ""; $unicodeHexChar = ""; $hexChar = strtoupper(dechex(ord($string[$i]))); // This is fix from Mario Klingemann, it prevents // droping chars below 16 because of missing leading 0 [zeros] if ( strlen($hexChar)==1 ) { $hexChar = "0" . $hexChar; } // This is quick fix of 10 chars in gsm0338 // Thanks goes to Andrea Carpani who pointed on this problem and solve it ;) if ( ( $from == "gsm0338" ) && ( $hexChar == '1B' ) ) { $i++; $hexChar .= strtoupper(dechex(ord($string[$i]))); } if ( $to != "utf-8" ) { if ( in_array( $hexChar, $charsetTable[$from] ) ) { $unicodeHexChar = array_search( $hexChar, $charsetTable[$from] ); $unicodeHexChars = explode( "+",$unicodeHexChar ); for( $unicodeHexCharElement = 0; $unicodeHexCharElement < count($unicodeHexChars); $unicodeHexCharElement++ ) { if ( array_key_exists( $unicodeHexChars[$unicodeHexCharElement], $charsetTable[$to] ) ) { if ( self::$entities == true ) { $text .= self::_unicodeEntity( self::_hexToUtf( $unicodeHexChars[$unicodeHexCharElement] ) ); } else { $text .= chr(hexdec($charsetTable[$to][$unicodeHexChars[$unicodeHexCharElement]])); } } else { static::$errors[] = "NO_CHAR_IN_DESTINATION: {$string[$i]}"; return $original; } } } else { static::$errors[] = "NO_CHAR_IN_SOURCE: {$string[$i]}"; return $original; } } else { if ( in_array( $hexChar, $charsetTable[$from] ) ) { $unicodeHexChar = array_search( $hexChar, $charsetTable[$from] ); $unicodeHexChars = explode( "+", $unicodeHexChar ); /** * Sometimes there are two or more utf-8 chars per one regular char. * Extream, example is polish old Mazovia encoding, where one char contains * two lettes 007a (z) and 0142 (l slash), we need to figure out how to * solve this problem. * The letters are merge with "plus" sign, there can be more than two chars. * In Mazowia we have 007A+0142, but sometimes it can look like this * 0x007A+0x0142+0x2034 (that string means nothing, it just shows the possibility...) */ for( $unicodeHexCharElement = 0; $unicodeHexCharElement < count($unicodeHexChars); $unicodeHexCharElement++) { if ( self::$entities == true ) { $text .= self::_unicodeEntity( self::_hexToUtf( $unicodeHexChars[$unicodeHexCharElement] ) ); } else { $text .= self::_hexToUtf( $unicodeHexChars[$unicodeHexCharElement] ); } } } else { static::$errors[] = "NO_CHAR_IN_SOURCE: {$string[$i]}"; return $original; } } } } /** * This is second case. We are encoding from multibyte char string. */ else if( $from == "utf-8" ) { $hexChar = ""; $unicodeHexChar = ""; $charsetTable = self::_makeConversionTable( $to ); if( is_array($charsetTable[$to]) AND count($charsetTable[$to]) ) { foreach ( $charsetTable[$to] as $unicodeHexChar => $hexChar ) { if (self::$entities == true) { $entityOrChar = self::_unicodeEntity(self::_hexToUtf($unicodeHexChar)); } else { $entityOrChar = chr(hexdec($hexChar)); } $string = str_replace( self::_hexToUtf( $unicodeHexChar), $entityOrChar, $string ); } } $text = $string; } return $text ? $text : $original; } /** * Convert unicode characters to unicode HTML entities * * @param string $unicodeString Input Unicode string (1 char can take more than 1 byte) * @return @e string * @see _hexToUtf() */ protected static function _unicodeEntity( $unicodeString ) { $outString = ""; $stringLength = strlen( $unicodeString ); for( $charPosition = 0; $charPosition < $stringLength; $charPosition++ ) { $char = $unicodeString [$charPosition]; $asciiChar = ord ($char); if ($asciiChar < 128) //1 7 0bbbbbbb (127) { $outString .= $char; } else if ($asciiChar >> 5 == 6) //2 11 110bbbbb 10bbbbbb (2047) { $firstByte = ($asciiChar & 31); $charPosition++; $char = $unicodeString [$charPosition]; $asciiChar = ord ($char); $secondByte = ($asciiChar & 63); $asciiChar = ($firstByte * 64) + $secondByte; $entity = sprintf ( "&#%d;", $asciiChar ); $outString .= $entity; } else if ($asciiChar >> 4 == 14) //3 16 1110bbbb 10bbbbbb 10bbbbbb { $firstByte = ($asciiChar & 31); $charPosition++; $char = $unicodeString [$charPosition]; $asciiChar = ord ($char); $secondByte = ($asciiChar & 63); $charPosition++; $char = $unicodeString [$charPosition]; $asciiChar = ord ($char); $thirdByte = ($asciiChar & 63); $asciiChar = ((($firstByte * 64) + $secondByte) * 64) + $thirdByte; $entity = sprintf ("&#%d;", $asciiChar); $outString .= $entity; } else if ($asciiChar >> 3 == 30) //4 21 11110bbb 10bbbbbb 10bbbbbb 10bbbbbb { $firstByte = ($asciiChar & 31); $charPosition++; $char = $unicodeString [$charPosition]; $asciiChar = ord ($char); $secondByte = ($asciiChar & 63); $charPosition++; $char = $unicodeString [$charPosition]; $asciiChar = ord ($char); $thirdByte = ($asciiChar & 63); $charPosition++; $char = $unicodeString [$charPosition]; $asciiChar = ord ($char); $fourthByte = ($asciiChar & 63); $asciiChar = ((((($firstByte * 64) + $secondByte) * 64) + $thirdByte) * 64) + $fourthByte; $entity = sprintf ("&#%d;", $asciiChar); $outString .= $entity; } } return $outString; } /** * Convert unicode characters to unicode HTML entities. * It is very similar to _unicodeEntity function (link below). There is one difference * in returned format. This time it's a regular char(s), in most cases it will be one or two chars. * * @param string $utfCharInHex Hexadecimal value of a unicode char. * @return @e string * @see _unicodeEntity() */ protected static function _hexToUtf( $utfCharInHex ) { $outputChar = ""; $utfCharInDec = hexdec($utfCharInHex); if( $utfCharInDec < 128 ) { $outputChar .= chr($utfCharInDec); } else if( $utfCharInDec < 2048 ) { $outputChar .= chr( ( $utfCharInDec>>6 ) + 192 ) . chr( ( $utfCharInDec&63 ) + 128 ); } else if( $utfCharInDec < 65536 ) { $outputChar .= chr( ( $utfCharInDec>>12 ) + 224 ) . chr( ( ( $utfCharInDec>>6 ) &63 ) + 128 ) . chr( ( $utfCharInDec&63 ) + 128 ); } else if( $utfCharInDec < 2097152 ) { $outputChar .= chr( $utfCharInDec>>18+240 ) . chr( ( ( $utfCharInDec>>12 ) &63 ) + 128 ) . chr( ( $utfCharInDec>>6 ) &63 + 128 ) . chr( $utfCharInDec&63 + 128 ); } return $outputChar; } /** * Create the conversion tables to use. * * This function creates table with two SBCS (Single Byte Character Set). Every conversion is through this table. * * - The file with encoding tables have to be save in "Format A" of unicode.org charset table format. * - BOTH charsets MUST be SBCS * - The files with encoding tables have to be complete (None of chars can be missing, unles you are sure you are not going to use it) * * "Format A" encoding file, if you have to build it by yourself should aplly these rules: * - you can comment everything with # * - first column contains 1 byte chars in hex starting from 0x.. * - second column contains unicode equivalent in hex starting from 0x.... * - then every next column is optional, but in "Format A" it should contain unicode char name or/and your own comment * - the columns can be splited by "spaces", "tabs", "," or any combination of these * - below is an example * * * # * # The entries are in ANSI X3.4 order. * # * 0x00 0x0000 # NULL end extra comment, if needed * 0x01 0x0001 # START OF HEADING * # Oh, one more thing, you can make comments inside of a rows if you like. * 0x02 0x0002 # START OF TEXT * 0x03 0x0003 # END OF TEXT * next line, and so on... * * * You can get full tables with encodings from http://www.unicode.org * * @param string $firstEncoding Name of first encoding and first encoding filename (thay have to be the same) * @param string $secondEncoding Name of second encoding and second encoding filename (thay have to be the same). Optional for building a joined table. * @return @e array */ protected static function _makeConversionTable( $firstEncoding, $secondEncoding = "" ) { $convertTable = array(); for( $i = 0; $i < func_num_args(); $i++ ) { /** * Because func_*** can't be used inside of another function call * we have to save it as a separate value. */ $fileName = func_get_arg($i); if ( !is_file( static::$charsetPath . $fileName ) ) { static::$errors[] = "FILE_NOT_FOUND: {$fileName}"; return; } $fileWithEncTabe = fopen( static::$charsetPath . $fileName, "r" ) or die(); //This die(); is just to make sure... while(!feof($fileWithEncTabe)) { /** * We asume that line is not longer * than 1024 which is the default value for fgets function */ if( $oneLine = trim( fgets( $fileWithEncTabe, 1024 ) ) ) { /** * We don't need all comment lines. I check only for "#" sign, because * this is a way of making comments by unicode.org in thair encoding files * and that's where the files are from :-) */ if ( substr( $oneLine, 0, 1 ) != "#" ) { /** * Sometimes inside the charset file the hex walues are separated by * "space" and sometimes by "tab", the below preg_split can also be used * to split files where separator is a ",", "\r", "\n" and "\f" */ $hexValue = preg_split ( "/[\s,]+/", $oneLine, 3 ); //We need only first 2 values /** * Sometimes char is UNDEFINED, or missing so we can't use it for convertion */ if (substr($hexValue[1], 0, 1) != "#") { $arrayKey = strtoupper(str_replace(strtolower("0x"), "", $hexValue[1])); $arrayValue = strtoupper(str_replace(strtolower("0x"), "", $hexValue[0])); $convertTable[ func_get_arg($i) ][ $arrayKey ] = $arrayValue; } } } } } return $convertTable; } }