* @copyright 2004-2007 phlyLabs Berlin, http://phlylabs.de * @version 0.5.1 * */ class idna_convert { /** * Holds all relevant mapping tables, loaded from a seperate file on construct * See RFC3454 for details * * @var array * @access private */ var $NP = array(); // Internal settings, do not mess with them var $_punycode_prefix = 'xn--'; var $_invalid_ucs = 0x80000000; var $_max_ucs = 0x10FFFF; var $_base = 36; var $_tmin = 1; var $_tmax = 26; var $_skew = 38; var $_damp = 700; var $_initial_bias = 72; var $_initial_n = 0x80; var $_sbase = 0xAC00; var $_lbase = 0x1100; var $_vbase = 0x1161; var $_tbase = 0x11A7; var $_lcount = 19; var $_vcount = 21; var $_tcount = 28; var $_ncount = 588; // _vcount * _tcount var $_scount = 11172; // _lcount * _tcount * _vcount var $_error = false; // See {@link set_paramter()} for details of how to change the following // settings from within your script / application var $_api_encoding = 'utf8'; // Default input charset is UTF-8 var $_allow_overlong = false; // Overlong UTF-8 encodings are forbidden var $_strict_mode = false; // Behave strict or not // The constructor function __construct($options = false) { $this->slast = $this->_sbase + $this->_lcount * $this->_vcount * $this->_tcount; if (function_exists('file_get_contents')) { $this->NP = unserialize(file_get_contents(dirname(__FILE__).'/npdata.ser')); } else { $this->NP = unserialize(join('', file(dirname(__FILE__).'/npdata.ser'))); } // If parameters are given, pass these to the respective method if (is_array($options)) { return $this->set_parameter($options); } return true; } /** * Sets a new option value. Available options and values: * [encoding - Use either UTF-8, UCS4 as array or UCS4 as string as input ('utf8' for UTF-8, * 'ucs4_string' and 'ucs4_array' respectively for UCS4); The output is always UTF-8] * [overlong - Unicode does not allow unnecessarily long encodings of chars, * to allow this, set this parameter to true, else to false; * default is false.] * [strict - true: strict mode, good for registration purposes - Causes errors * on failures; false: loose mode, ideal for "wildlife" applications * by silently ignoring errors and returning the original input instead * * @param mixed Parameter to set (string: single parameter; array of Parameter => Value pairs) * @param string Value to use (if parameter 1 is a string) * @return boolean true on success, false otherwise * @access public */ function set_parameter($option, $value = false) { if (!is_array($option)) { $option = array($option => $value); } foreach ($option as $k => $v) { switch ($k) { case 'encoding': switch ($v) { case 'utf8': case 'ucs4_string': case 'ucs4_array': $this->_api_encoding = $v; break; default: $this->_error('Set Parameter: Unknown parameter '.$v.' for option '.$k); return false; } break; case 'overlong': $this->_allow_overlong = ($v) ? true : false; break; case 'strict': $this->_strict_mode = ($v) ? true : false; break; default: $this->_error('Set Parameter: Unknown option '.$k); return false; } } return true; } /** * Decode a given ACE domain name * @param string Domain name (ACE string) * [@param string Desired output encoding, see {@link set_parameter}] * @return string Decoded Domain name (UTF-8 or UCS-4) * @access public */ function decode($input, $one_time_encoding = false) { // Optionally set if ($one_time_encoding) { switch ($one_time_encoding) { case 'utf8': case 'ucs4_string': case 'ucs4_array': break; default: $this->_error('Unknown encoding '.$one_time_encoding); return false; } } // Make sure to drop any newline characters around $input = trim($input); // Negotiate input and try to determine, whether it is a plain string, // an email address or something like a complete URL if (strpos($input, '@')) { // Maybe it is an email address // No no in strict mode if ($this->_strict_mode) { $this->_error('Only simple domain name parts can be handled in strict mode'); return false; } list ($email_pref, $input) = explode('@', $input, 2); $arr = explode('.', $input); foreach ($arr as $k => $v) { if (preg_match('!^'.preg_quote($this->_punycode_prefix, '!').'!', $v)) { $conv = $this->_decode($v); if ($conv) $arr[$k] = $conv; } } $input = join('.', $arr); $arr = explode('.', $email_pref); foreach ($arr as $k => $v) { if (preg_match('!^'.preg_quote($this->_punycode_prefix, '!').'!', $v)) { $conv = $this->_decode($v); if ($conv) $arr[$k] = $conv; } } $email_pref = join('.', $arr); $return = $email_pref . '@' . $input; } elseif (preg_match('![:\./]!', $input)) { // Or a complete domain name (with or without paths / parameters) // No no in strict mode if ($this->_strict_mode) { $this->_error('Only simple domain name parts can be handled in strict mode'); return false; } $parsed = parse_url($input); if (isset($parsed['host'])) { $arr = explode('.', $parsed['host']); foreach ($arr as $k => $v) { $conv = $this->_decode($v); if ($conv) $arr[$k] = $conv; } $parsed['host'] = join('.', $arr); $return = (empty($parsed['scheme']) ? '' : $parsed['scheme'].(strtolower($parsed['scheme']) == 'mailto' ? ':' : '://')) .(empty($parsed['user']) ? '' : $parsed['user'].(empty($parsed['pass']) ? '' : ':'.$parsed['pass']).'@') .$parsed['host'] .(empty($parsed['port']) ? '' : ':'.$parsed['port']) .(empty($parsed['path']) ? '' : $parsed['path']) .(empty($parsed['query']) ? '' : '?'.$parsed['query']) .(empty($parsed['fragment']) ? '' : '#'.$parsed['fragment']); } else { // parse_url seems to have failed, try without it $arr = explode('.', $input); foreach ($arr as $k => $v) { $conv = $this->_decode($v); $arr[$k] = ($conv) ? $conv : $v; } $return = join('.', $arr); } } else { // Otherwise we consider it being a pure domain name string $return = $this->_decode($input); if (!$return) $return = $input; } // The output is UTF-8 by default, other output formats need conversion here // If one time encoding is given, use this, else the objects property switch (($one_time_encoding) ? $one_time_encoding : $this->_api_encoding) { case 'utf8': return $return; break; case 'ucs4_string': return $this->_ucs4_to_ucs4_string($this->_utf8_to_ucs4($return)); break; case 'ucs4_array': return $this->_utf8_to_ucs4($return); break; default: $this->_error('Unsupported output format'); return false; } } /** * Encode a given UTF-8 domain name * @param string Domain name (UTF-8 or UCS-4) * [@param string Desired input encoding, see {@link set_parameter}] * @return string Encoded Domain name (ACE string) * @access public */ function encode($decoded, $one_time_encoding = false) { // Forcing conversion of input to UCS4 array // If one time encoding is given, use this, else the objects property switch ($one_time_encoding ? $one_time_encoding : $this->_api_encoding) { case 'utf8': $decoded = $this->_utf8_to_ucs4($decoded); break; case 'ucs4_string': $decoded = $this->_ucs4_string_to_ucs4($decoded); case 'ucs4_array': break; default: $this->_error('Unsupported input format: '.($one_time_encoding ? $one_time_encoding : $this->_api_encoding)); return false; } // No input, no output, what else did you expect? if (empty($decoded)) return ''; // Anchors for iteration $last_begin = 0; // Output string $output = ''; foreach ($decoded as $k => $v) { // Make sure to use just the plain dot switch($v) { case 0x3002: case 0xFF0E: case 0xFF61: $decoded[$k] = 0x2E; // Right, no break here, the above are converted to dots anyway // Stumbling across an anchoring character case 0x2E: case 0x2F: case 0x3A: case 0x3F: case 0x40: // Neither email addresses nor URLs allowed in strict mode if ($this->_strict_mode) { $this->_error('Neither email addresses nor URLs are allowed in strict mode.'); return false; } // Skip first char if ($k) { $encoded = ''; $encoded = $this->_encode(array_slice($decoded, $last_begin, (($k)-$last_begin))); if ($encoded) { $output .= $encoded; } else { $output .= $this->_ucs4_to_utf8(array_slice($decoded, $last_begin, (($k)-$last_begin))); } $output .= chr($decoded[$k]); } $last_begin = $k + 1; } } // Catch the rest of the string if ($last_begin) { $inp_len = sizeof($decoded); $encoded = ''; $encoded = $this->_encode(array_slice($decoded, $last_begin, (($inp_len)-$last_begin))); if ($encoded) { $output .= $encoded; } else { $output .= $this->_ucs4_to_utf8(array_slice($decoded, $last_begin, (($inp_len)-$last_begin))); } return $output; } if ($output = $this->_encode($decoded)) { return $output; } return $this->_ucs4_to_utf8($decoded); } /** * Use this method to get the last error ocurred * @param void * @return string The last error, that occured * @access public */ function get_last_error() { return $this->_error; } /** * The actual decoding algorithm * @access private */ function _decode($encoded) { // We do need to find the Punycode prefix if (!preg_match('!^'.preg_quote($this->_punycode_prefix, '!').'!', $encoded)) { $this->_error('This is not a punycode string'); return false; } $encode_test = preg_replace('!^'.preg_quote($this->_punycode_prefix, '!').'!', '', $encoded); // If nothing left after removing the prefix, it is hopeless if (!$encode_test) { $this->_error('The given encoded string was empty'); return false; } // Find last occurence of the delimiter $delim_pos = strrpos($encoded, '-'); if ($delim_pos > strlen($this->_punycode_prefix)) { for ($k = strlen($this->_punycode_prefix); $k < $delim_pos; ++$k) { $decoded[] = ord($encoded[$k]); } } else { $decoded = array(); } $deco_len = count($decoded); $enco_len = strlen($encoded); // Wandering through the strings; init $is_first = true; $bias = $this->_initial_bias; $idx = 0; $char = $this->_initial_n; for ($enco_idx = ($delim_pos) ? ($delim_pos + 1) : 0; $enco_idx < $enco_len; ++$deco_len) { for ($old_idx = $idx, $w = 1, $k = $this->_base; 1 ; $k += $this->_base) { $digit = $this->_decode_digit($encoded[$enco_idx++]); $idx += $digit * $w; $t = ($k <= $bias) ? $this->_tmin : (($k >= $bias + $this->_tmax) ? $this->_tmax : ($k - $bias)); if ($digit < $t) break; $w = (int) ($w * ($this->_base - $t)); } $bias = $this->_adapt($idx - $old_idx, $deco_len + 1, $is_first); $is_first = false; $char += (int) ($idx / ($deco_len + 1)); $idx %= ($deco_len + 1); if ($deco_len > 0) { // Make room for the decoded char for ($i = $deco_len; $i > $idx; $i--) { $decoded[$i] = $decoded[($i - 1)]; } } $decoded[$idx++] = $char; } return $this->_ucs4_to_utf8($decoded); } /** * The actual encoding algorithm * @access private */ function _encode($decoded) { // We cannot encode a domain name containing the Punycode prefix $extract = strlen($this->_punycode_prefix); $check_pref = $this->_utf8_to_ucs4($this->_punycode_prefix); $check_deco = array_slice($decoded, 0, $extract); if ($check_pref == $check_deco) { $this->_error('This is already a punycode string'); return false; } // We will not try to encode strings consisting of basic code points only $encodable = false; foreach ($decoded as $k => $v) { if ($v > 0x7a) { $encodable = true; break; } } if (!$encodable) { $this->_error('The given string does not contain encodable chars'); return false; } // Do NAMEPREP $decoded = $this->_nameprep($decoded); if (!$decoded || !is_array($decoded)) return false; // NAMEPREP failed $deco_len = count($decoded); if (!$deco_len) return false; // Empty array $codecount = 0; // How many chars have been consumed $encoded = ''; // Copy all basic code points to output for ($i = 0; $i < $deco_len; ++$i) { $test = $decoded[$i]; // Will match [-0-9a-zA-Z] if ((0x2F < $test && $test < 0x40) || (0x40 < $test && $test < 0x5B) || (0x60 < $test && $test <= 0x7B) || (0x2D == $test)) { $encoded .= chr($decoded[$i]); $codecount++; } } if ($codecount == $deco_len) return $encoded; // All codepoints were basic ones // Start with the prefix; copy it to output $encoded = $this->_punycode_prefix.$encoded; // If we have basic code points in output, add an hyphen to the end if ($codecount) $encoded .= '-'; // Now find and encode all non-basic code points $is_first = true; $cur_code = $this->_initial_n; $bias = $this->_initial_bias; $delta = 0; while ($codecount < $deco_len) { // Find the smallest code point >= the current code point and // remember the last ouccrence of it in the input for ($i = 0, $next_code = $this->_max_ucs; $i < $deco_len; $i++) { if ($decoded[$i] >= $cur_code && $decoded[$i] <= $next_code) { $next_code = $decoded[$i]; } } $delta += ($next_code - $cur_code) * ($codecount + 1); $cur_code = $next_code; // Scan input again and encode all characters whose code point is $cur_code for ($i = 0; $i < $deco_len; $i++) { if ($decoded[$i] < $cur_code) { $delta++; } elseif ($decoded[$i] == $cur_code) { for ($q = $delta, $k = $this->_base; 1; $k += $this->_base) { $t = ($k <= $bias) ? $this->_tmin : (($k >= $bias + $this->_tmax) ? $this->_tmax : $k - $bias); if ($q < $t) break; $encoded .= $this->_encode_digit(intval($t + (($q - $t) % ($this->_base - $t)))); //v0.4.5 Changed from ceil() to intval() $q = (int) (($q - $t) / ($this->_base - $t)); } $encoded .= $this->_encode_digit($q); $bias = $this->_adapt($delta, $codecount+1, $is_first); $codecount++; $delta = 0; $is_first = false; } } $delta++; $cur_code++; } return $encoded; } /** * Adapt the bias according to the current code point and position * @access private */ function _adapt($delta, $npoints, $is_first) { $delta = intval($is_first ? ($delta / $this->_damp) : ($delta / 2)); $delta += intval($delta / $npoints); for ($k = 0; $delta > (($this->_base - $this->_tmin) * $this->_tmax) / 2; $k += $this->_base) { $delta = intval($delta / ($this->_base - $this->_tmin)); } return intval($k + ($this->_base - $this->_tmin + 1) * $delta / ($delta + $this->_skew)); } /** * Encoding a certain digit * @access private */ function _encode_digit($d) { return chr($d + 22 + 75 * ($d < 26)); } /** * Decode a certain digit * @access private */ function _decode_digit($cp) { $cp = ord($cp); return ($cp - 48 < 10) ? $cp - 22 : (($cp - 65 < 26) ? $cp - 65 : (($cp - 97 < 26) ? $cp - 97 : $this->_base)); } /** * Internal error handling method * @access private */ function _error($error = '') { $this->_error = $error; } /** * Do Nameprep according to RFC3491 and RFC3454 * @param array Unicode Characters * @return string Unicode Characters, Nameprep'd * @access private */ function _nameprep($input) { $output = array(); $error = false; // // Mapping // Walking through the input array, performing the required steps on each of // the input chars and putting the result into the output array // While mapping required chars we apply the cannonical ordering foreach ($input as $v) { // Map to nothing == skip that code point if (in_array($v, $this->NP['map_nothing'])) continue; // Try to find prohibited input if (in_array($v, $this->NP['prohibit']) || in_array($v, $this->NP['general_prohibited'])) { $this->_error('NAMEPREP: Prohibited input U+'.sprintf('%08X', $v)); return false; } foreach ($this->NP['prohibit_ranges'] as $range) { if ($range[0] <= $v && $v <= $range[1]) { $this->_error('NAMEPREP: Prohibited input U+'.sprintf('%08X', $v)); return false; } } // // Hangul syllable decomposition if (0xAC00 <= $v && $v <= 0xD7AF) { foreach ($this->_hangul_decompose($v) as $out) { $output[] = (int) $out; } // There's a decomposition mapping for that code point } elseif (isset($this->NP['replacemaps'][$v])) { foreach ($this->_apply_cannonical_ordering($this->NP['replacemaps'][$v]) as $out) { $output[] = (int) $out; } } else { $output[] = (int) $v; } } // Before applying any Combining, try to rearrange any Hangul syllables $output = $this->_hangul_compose($output); // // Combine code points // $last_class = 0; $last_starter = 0; $out_len = count($output); for ($i = 0; $i < $out_len; ++$i) { $class = $this->_get_combining_class($output[$i]); if ((!$last_class || $last_class > $class) && $class) { // Try to match $seq_len = $i - $last_starter; $out = $this->_combine(array_slice($output, $last_starter, $seq_len)); // On match: Replace the last starter with the composed character and remove // the now redundant non-starter(s) if ($out) { $output[$last_starter] = $out; if (count($out) != $seq_len) { for ($j = $i+1; $j < $out_len; ++$j) { $output[$j-1] = $output[$j]; } unset($output[$out_len]); } // Rewind the for loop by one, since there can be more possible compositions $i--; $out_len--; $last_class = ($i == $last_starter) ? 0 : $this->_get_combining_class($output[$i-1]); continue; } } // The current class is 0 if (!$class) $last_starter = $i; $last_class = $class; } return $output; } /** * Decomposes a Hangul syllable * (see http://www.unicode.org/unicode/reports/tr15/#Hangul * @param integer 32bit UCS4 code point * @return array Either Hangul Syllable decomposed or original 32bit value as one value array * @access private */ function _hangul_decompose($char) { $sindex = (int) $char - $this->_sbase; if ($sindex < 0 || $sindex >= $this->_scount) { return array($char); } $result = array(); $result[] = (int) $this->_lbase + $sindex / $this->_ncount; $result[] = (int) $this->_vbase + ($sindex % $this->_ncount) / $this->_tcount; $T = intval($this->_tbase + $sindex % $this->_tcount); if ($T != $this->_tbase) $result[] = $T; return $result; } /** * Ccomposes a Hangul syllable * (see http://www.unicode.org/unicode/reports/tr15/#Hangul * @param array Decomposed UCS4 sequence * @return array UCS4 sequence with syllables composed * @access private */ function _hangul_compose($input) { $inp_len = count($input); if (!$inp_len) return array(); $result = array(); $last = (int) $input[0]; $result[] = $last; // copy first char from input to output for ($i = 1; $i < $inp_len; ++$i) { $char = (int) $input[$i]; $sindex = $last - $this->_sbase; $lindex = $last - $this->_lbase; $vindex = $char - $this->_vbase; $tindex = $char - $this->_tbase; // Find out, whether two current characters are LV and T if (0 <= $sindex && $sindex < $this->_scount && ($sindex % $this->_tcount == 0) && 0 <= $tindex && $tindex <= $this->_tcount) { // create syllable of form LVT $last += $tindex; $result[(count($result) - 1)] = $last; // reset last continue; // discard char } // Find out, whether two current characters form L and V if (0 <= $lindex && $lindex < $this->_lcount && 0 <= $vindex && $vindex < $this->_vcount) { // create syllable of form LV $last = (int) $this->_sbase + ($lindex * $this->_vcount + $vindex) * $this->_tcount; $result[(count($result) - 1)] = $last; // reset last continue; // discard char } // if neither case was true, just add the character $last = $char; $result[] = $char; } return $result; } /** * Returns the combining class of a certain wide char * @param integer Wide char to check (32bit integer) * @return integer Combining class if found, else 0 * @access private */ function _get_combining_class($char) { return isset($this->NP['norm_combcls'][$char]) ? $this->NP['norm_combcls'][$char] : 0; } /** * Apllies the cannonical ordering of a decomposed UCS4 sequence * @param array Decomposed UCS4 sequence * @return array Ordered USC4 sequence * @access private */ function _apply_cannonical_ordering($input) { $swap = true; $size = count($input); while ($swap) { $swap = false; $last = $this->_get_combining_class(intval($input[0])); for ($i = 0; $i < $size-1; ++$i) { $next = $this->_get_combining_class(intval($input[$i+1])); if ($next != 0 && $last > $next) { // Move item leftward until it fits for ($j = $i + 1; $j > 0; --$j) { if ($this->_get_combining_class(intval($input[$j-1])) <= $next) break; $t = intval($input[$j]); $input[$j] = intval($input[$j-1]); $input[$j-1] = $t; $swap = true; } // Reentering the loop looking at the old character again $next = $last; } $last = $next; } } return $input; } /** * Do composition of a sequence of starter and non-starter * @param array UCS4 Decomposed sequence * @return array Ordered USC4 sequence * @access private */ function _combine($input) { $inp_len = count($input); foreach ($this->NP['replacemaps'] as $np_src => $np_target) { if ($np_target[0] != $input[0]) continue; if (count($np_target) != $inp_len) continue; $hit = false; foreach ($input as $k2 => $v2) { if ($v2 == $np_target[$k2]) { $hit = true; } else { $hit = false; break; } } if ($hit) return $np_src; } return false; } /** * This converts an UTF-8 encoded string to its UCS-4 representation * By talking about UCS-4 "strings" we mean arrays of 32bit integers representing * each of the "chars". This is due to PHP not being able to handle strings with * bit depth different from 8. This apllies to the reverse method _ucs4_to_utf8(), too. * The following UTF-8 encodings are supported: * bytes bits representation * 1 7 0xxxxxxx * 2 11 110xxxxx 10xxxxxx * 3 16 1110xxxx 10xxxxxx 10xxxxxx * 4 21 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx * 5 26 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx * 6 31 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx * Each x represents a bit that can be used to store character data. * The five and six byte sequences are part of Annex D of ISO/IEC 10646-1:2000 * @access private */ function _utf8_to_ucs4($input) { $output = array(); $out_len = 0; $inp_len = strlen($input); $mode = 'next'; $test = 'none'; for ($k = 0; $k < $inp_len; ++$k) { $v = ord($input[$k]); // Extract byte from input string if ($v < 128) { // We found an ASCII char - put into stirng as is $output[$out_len] = $v; ++$out_len; if ('add' == $mode) { $this->_error('Conversion from UTF-8 to UCS-4 failed: malformed input at byte '.$k); return false; } continue; } if ('next' == $mode) { // Try to find the next start byte; determine the width of the Unicode char $start_byte = $v; $mode = 'add'; $test = 'range'; if ($v >> 5 == 6) { // &110xxxxx 10xxxxx $next_byte = 0; // Tells, how many times subsequent bitmasks must rotate 6bits to the left $v = ($v - 192) << 6; } elseif ($v >> 4 == 14) { // &1110xxxx 10xxxxxx 10xxxxxx $next_byte = 1; $v = ($v - 224) << 12; } elseif ($v >> 3 == 30) { // &11110xxx 10xxxxxx 10xxxxxx 10xxxxxx $next_byte = 2; $v = ($v - 240) << 18; } elseif ($v >> 2 == 62) { // &111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx $next_byte = 3; $v = ($v - 248) << 24; } elseif ($v >> 1 == 126) { // &1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx $next_byte = 4; $v = ($v - 252) << 30; } else { $this->_error('This might be UTF-8, but I don\'t understand it at byte '.$k); return false; } if ('add' == $mode) { $output[$out_len] = (int) $v; ++$out_len; continue; } } if ('add' == $mode) { if (!$this->_allow_overlong && $test == 'range') { $test = 'none'; if (($v < 0xA0 && $start_byte == 0xE0) || ($v < 0x90 && $start_byte == 0xF0) || ($v > 0x8F && $start_byte == 0xF4)) { $this->_error('Bogus UTF-8 character detected (out of legal range) at byte '.$k); return false; } } if ($v >> 6 == 2) { // Bit mask must be 10xxxxxx $v = ($v - 128) << ($next_byte * 6); $output[($out_len - 1)] += $v; --$next_byte; } else { $this->_error('Conversion from UTF-8 to UCS-4 failed: malformed input at byte '.$k); return false; } if ($next_byte < 0) { $mode = 'next'; } } } // for return $output; } /** * Convert UCS-4 string into UTF-8 string * See _utf8_to_ucs4() for details * @access private */ function _ucs4_to_utf8($input) { $output = ''; $k = 0; foreach ($input as $v) { ++$k; // $v = ord($v); if ($v < 128) { // 7bit are transferred literally $output .= chr($v); } elseif ($v < (1 << 11)) { // 2 bytes $output .= chr(192 + ($v >> 6)) . chr(128 + ($v & 63)); } elseif ($v < (1 << 16)) { // 3 bytes $output .= chr(224 + ($v >> 12)) . chr(128 + (($v >> 6) & 63)) . chr(128 + ($v & 63)); } elseif ($v < (1 << 21)) { // 4 bytes $output .= chr(240 + ($v >> 18)) . chr(128 + (($v >> 12) & 63)) . chr(128 + (($v >> 6) & 63)) . chr(128 + ($v & 63)); } elseif ($v < (1 << 26)) { // 5 bytes $output .= chr(248 + ($v >> 24)) . chr(128 + (($v >> 18) & 63)) . chr(128 + (($v >> 12) & 63)) . chr(128 + (($v >> 6) & 63)) . chr(128 + ($v & 63)); } elseif ($v < (1 << 31)) { // 6 bytes $output .= chr(252 + ($v >> 30)) . chr(128 + (($v >> 24) & 63)) . chr(128 + (($v >> 18) & 63)) . chr(128 + (($v >> 12) & 63)) . chr(128 + (($v >> 6) & 63)) . chr(128 + ($v & 63)); } else { $this->_error('Conversion from UCS-4 to UTF-8 failed: malformed input at byte '.$k); return false; } } return $output; } /** * Convert UCS-4 array into UCS-4 string * * @access private */ function _ucs4_to_ucs4_string($input) { $output = ''; // Take array values and split output to 4 bytes per value // The bit mask is 255, which reads &11111111 foreach ($input as $v) { $output .= chr(($v >> 24) & 255).chr(($v >> 16) & 255).chr(($v >> 8) & 255).chr($v & 255); } return $output; } /** * Convert UCS-4 strin into UCS-4 garray * * @access private */ function _ucs4_string_to_ucs4($input) { $output = array(); $inp_len = strlen($input); // Input length must be dividable by 4 if ($inp_len % 4) { $this->_error('Input UCS4 string is broken'); return false; } // Empty input - return empty output if (!$inp_len) return $output; for ($i = 0, $out_len = -1; $i < $inp_len; ++$i) { // Increment output position every 4 input bytes if (!($i % 4)) { $out_len++; $output[$out_len] = 0; } $output[$out_len] += ord($input[$i]) << (8 * (3 - ($i % 4) ) ); } return $output; } } /** * Adapter class for aligning the API of idna_convert with that of Net_IDNA * @author Matthias Sommerfeld */ class Net_IDNA_php4 extends idna_convert { /** * Sets a new option value. Available options and values: * [encoding - Use either UTF-8, UCS4 as array or UCS4 as string as input ('utf8' for UTF-8, * 'ucs4_string' and 'ucs4_array' respectively for UCS4); The output is always UTF-8] * [overlong - Unicode does not allow unnecessarily long encodings of chars, * to allow this, set this parameter to true, else to false; * default is false.] * [strict - true: strict mode, good for registration purposes - Causes errors * on failures; false: loose mode, ideal for "wildlife" applications * by silently ignoring errors and returning the original input instead * * @param mixed Parameter to set (string: single parameter; array of Parameter => Value pairs) * @param string Value to use (if parameter 1 is a string) * @return boolean true on success, false otherwise * @access public */ function setParams($option, $param = false) { return $this->IC->set_parameters($option, $param); } } ?>