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