Collaboration diagram for UtfNormal:

Static Public Member Functions
static	cleanUp ($string)
	The ultimate convenience function! Clean up invalid UTF-8 sequences, and convert to normal form C, canonical composition. More...

static	toNFC ($string)
	Convert a UTF-8 string to normal form C, canonical composition. More...

static	toNFD ($string)
	Convert a UTF-8 string to normal form D, canonical decomposition. More...

static	toNFKC ($string)
	Convert a UTF-8 string to normal form KC, compatibility composition. More...

static	toNFKD ($string)
	Convert a UTF-8 string to normal form KD, compatibility decomposition. More...

static	loadData ()
	Load the basic composition data if necessary. More...

static	quickIsNFC ($string)
	Returns true if the string is definitely in NFC. More...

static	quickIsNFCVerify (&$string)
	Returns true if the string is definitely in NFC. More...

static	NFC ($string)

static	NFD ($string)

static	NFKC ($string)

static	NFKD ($string)

static	fastDecompose ($string, $map)
	Perform decomposition of a UTF-8 string into either D or KD form (depending on which decomposition map is passed to us). More...

static	fastCombiningSort ($string)
	Sorts combining characters into canonical order. More...

static	fastCompose ($string)
	Produces canonically composed sequences, i.e. More...

static	placebo ($string)
	This is just used for the benchmark, comparing how long it takes to interate through a string without really doing anything of substance. More...

Detailed Description

Definition at line 112 of file UtfNormal.php.

Member Function Documentation

◆ cleanUp()

static UtfNormal::cleanUp ( $string )

static

The ultimate convenience function! Clean up invalid UTF-8 sequences, and convert to normal form C, canonical composition.

Fast return for pure ASCII strings; some lesser optimizations for strings containing only known-good characters. Not as fast as toNFC().

Parameters

string $string a UTF-8 string

Returns: string a clean, shiny, normalized UTF-8 string

Definition at line 125 of file UtfNormal.php.

References NFC(), NORMALIZE_ICU, quickIsNFCVerify(), UNORM_NFC, UTF8_FFFE, UTF8_FFFF, and UTF8_REPLACEMENT.

     {
         if (NORMALIZE_ICU) {
             # We exclude a few chars that ICU would not.
             $string = preg_replace(
                 '/[\x00-\x08\x0b\x0c\x0e-\x1f]/',
                 UTF8_REPLACEMENT,
                 $string
             );
             $string = str_replace(UTF8_FFFE, UTF8_REPLACEMENT, $string);
             $string = str_replace(UTF8_FFFF, UTF8_REPLACEMENT, $string);
 
             # UnicodeString constructor fails if the string ends with a
             # head byte. Add a junk char at the end, we'll strip it off.
             return rtrim(utf8_normalize($string . "\x01", UNORM_NFC), "\x01");
         } elseif (UtfNormal::quickIsNFCVerify($string)) {
             # Side effect -- $string has had UTF-8 errors cleaned up.
             return $string;
         } else {
             return UtfNormal::NFC($string);
         }
     }

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◆ fastCombiningSort()

static UtfNormal::fastCombiningSort ( $string )

static

Sorts combining characters into canonical order.

This is the final step in creating decomposed normal forms D and KD.

Parameters

string $string a valid, decomposed UTF-8 string. Input is not validated.

Returns: string a UTF-8 string with combining characters sorted in canonical order

Definition at line 638 of file UtfNormal.php.

References $c, $i, $n, $out, $utfCombiningClass, and loadData().

Referenced by NFD(), and NFKD().

     {
         UtfNormal::loadData();
         global $utfCombiningClass;
         $len = strlen($string);
         $out = '';
         $combiners = array();
         $lastClass = -1;
         for ($i = 0; $i < $len; $i++) {
             $c = $string[$i];
             $n = ord($c);
             if ($n >= 0x80) {
                 if ($n >= 0xf0) {
                     $c = substr($string, $i, 4);
                     $i += 3;
                 } elseif ($n >= 0xe0) {
                     $c = substr($string, $i, 3);
                     $i += 2;
                 } elseif ($n >= 0xc0) {
                     $c = substr($string, $i, 2);
                     $i++;
                 }
                 if (isset($utfCombiningClass[$c])) {
                     $lastClass = $utfCombiningClass[$c];
                     if (isset($combiners[$lastClass])) {
                         $combiners[$lastClass] .= $c;
                     } else {
                         $combiners[$lastClass] = $c;
                     }
                     continue;
                 }
             }
             if ($lastClass) {
                 ksort($combiners);
                 $out .= implode('', $combiners);
                 $combiners = array();
             }
             $out .= $c;
             $lastClass = 0;
         }
         if ($lastClass) {
             ksort($combiners);
             $out .= implode('', $combiners);
         }
         return $out;
     }

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◆ fastCompose()

static UtfNormal::fastCompose ( $string )

static

Produces canonically composed sequences, i.e.

normal form C or KC.

Parameters

string $string a valid UTF-8 string in sorted normal form D or KD. Input is not validated.

Returns: string a UTF-8 string with canonical precomposed characters used where possible

Definition at line 693 of file UtfNormal.php.

References $c, $i, $n, $out, $tail, $utfCanonicalComp, $utfCombiningClass, loadData(), UNICODE_HANGUL_FIRST, UNICODE_HANGUL_TCOUNT, UNICODE_HANGUL_VCOUNT, UTF8_HANGUL_FIRST, UTF8_HANGUL_LAST, UTF8_HANGUL_LBASE, UTF8_HANGUL_LEND, UTF8_HANGUL_TBASE, UTF8_HANGUL_TEND, UTF8_HANGUL_VBASE, and UTF8_HANGUL_VEND.

Referenced by NFC(), and NFKC().

     {
         UtfNormal::loadData();
         global $utfCanonicalComp, $utfCombiningClass;
         $len = strlen($string);
         $out = '';
         $lastClass = -1;
         $lastHangul = 0;
         $startChar = '';
         $combining = '';
         $x1 = ord(substr(UTF8_HANGUL_VBASE, 0, 1));
         $x2 = ord(substr(UTF8_HANGUL_TEND, 0, 1));
         for ($i = 0; $i < $len; $i++) {
             $c = $string[$i];
             $n = ord($c);
             if ($n < 0x80) {
                 # No combining characters here...
                 $out .= $startChar;
                 $out .= $combining;
                 $startChar = $c;
                 $combining = '';
                 $lastClass = 0;
                 continue;
             } elseif ($n >= 0xf0) {
                 $c = substr($string, $i, 4);
                 $i += 3;
             } elseif ($n >= 0xe0) {
                 $c = substr($string, $i, 3);
                 $i += 2;
             } elseif ($n >= 0xc0) {
                 $c = substr($string, $i, 2);
                 $i++;
             }
             $pair = $startChar . $c;
             if ($n > 0x80) {
                 if (isset($utfCombiningClass[$c])) {
                     # A combining char; see what we can do with it
                     $class = $utfCombiningClass[$c];
                     if (!empty($startChar) &&
                         $lastClass < $class &&
                         $class > 0 &&
                         isset($utfCanonicalComp[$pair])) {
                         $startChar = $utfCanonicalComp[$pair];
                         $class = 0;
                     } else {
                         $combining .= $c;
                     }
                     $lastClass = $class;
                     $lastHangul = 0;
                     continue;
                 }
             }
             # New start char
             if ($lastClass == 0) {
                 if (isset($utfCanonicalComp[$pair])) {
                     $startChar = $utfCanonicalComp[$pair];
                     $lastHangul = 0;
                     continue;
                 }
                 if ($n >= $x1 && $n <= $x2) {
                     # WARNING: Hangul code is painfully slow.
                     # I apologize for this ugly, ugly code; however
                     # performance is even more teh suck if we call
                     # out to nice clean functions. Lookup tables are
                     # marginally faster, but require a lot of space.
                     #
                     if ($c >= UTF8_HANGUL_VBASE &&
                         $c <= UTF8_HANGUL_VEND &&
                         $startChar >= UTF8_HANGUL_LBASE &&
                         $startChar <= UTF8_HANGUL_LEND) {
                         #
                         #$lIndex = utf8ToCodepoint( $startChar ) - UNICODE_HANGUL_LBASE;
                         #$vIndex = utf8ToCodepoint( $c ) - UNICODE_HANGUL_VBASE;
                         $lIndex = ord($startChar[2]) - 0x80;
                         $vIndex = ord($c[2]) - 0xa1;
 
                         $hangulPoint = UNICODE_HANGUL_FIRST +
                             UNICODE_HANGUL_TCOUNT *
                             (UNICODE_HANGUL_VCOUNT * $lIndex + $vIndex);
 
                         # Hardcode the limited-range UTF-8 conversion:
                         $startChar = chr($hangulPoint >> 12 & 0x0f | 0xe0) .
                                      chr($hangulPoint >> 6 & 0x3f | 0x80) .
                                      chr($hangulPoint & 0x3f | 0x80);
                         $lastHangul = 0;
                         continue;
                     } elseif ($c >= UTF8_HANGUL_TBASE &&
                               $c <= UTF8_HANGUL_TEND &&
                               $startChar >= UTF8_HANGUL_FIRST &&
                               $startChar <= UTF8_HANGUL_LAST &&
                               !$lastHangul) {
                         # $tIndex = utf8ToCodepoint( $c ) - UNICODE_HANGUL_TBASE;
                         $tIndex = ord($c[2]) - 0xa7;
                         if ($tIndex < 0) {
                             $tIndex = ord($c[2]) - 0x80 + (0x11c0 - 0x11a7);
                         }
 
                         # Increment the code point by $tIndex, without
                         # the function overhead of decoding and recoding UTF-8
                         #
                         $tail = ord($startChar[2]) + $tIndex;
                         if ($tail > 0xbf) {
                             $tail -= 0x40;
                             $mid = ord($startChar[1]) + 1;
                             if ($mid > 0xbf) {
                                 $startChar[0] = chr(ord($startChar[0]) + 1);
                                 $mid -= 0x40;
                             }
                             $startChar[1] = chr($mid);
                         }
                         $startChar[2] = chr($tail);
 
                         # If there's another jamo char after this, *don't* try to merge it.
                         $lastHangul = 1;
                         continue;
                     }
                 }
             }
             $out .= $startChar;
             $out .= $combining;
             $startChar = $c;
             $combining = '';
             $lastClass = 0;
             $lastHangul = 0;
         }
         $out .= $startChar . $combining;
         return $out;
     }

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◆ fastDecompose()

static UtfNormal::fastDecompose	(	$string,
		$map
	)

static

Perform decomposition of a UTF-8 string into either D or KD form (depending on which decomposition map is passed to us).

Input is assumed to be valid UTF-8. Invalid code will break.

Parameters

string	$string	Valid UTF-8 string
array	$map	hash of expanded decomposition map

Returns: string a UTF-8 string decomposed, not yet normalized (needs sorting)

Definition at line 576 of file UtfNormal.php.

References $c, $i, $index, $l, $map, $n, $out, $t, loadData(), UNICODE_HANGUL_FIRST, UNICODE_HANGUL_NCOUNT, UNICODE_HANGUL_TCOUNT, UTF8_HANGUL_FIRST, and UTF8_HANGUL_LAST.

Referenced by NFD(), and NFKD().

     {
         UtfNormal::loadData();
         $len = strlen($string);
         $out = '';
         for ($i = 0; $i < $len; $i++) {
             $c = $string[$i];
             $n = ord($c);
             if ($n < 0x80) {
                 # ASCII chars never decompose
                 # THEY ARE IMMORTAL
                 $out .= $c;
                 continue;
             } elseif ($n >= 0xf0) {
                 $c = substr($string, $i, 4);
                 $i += 3;
             } elseif ($n >= 0xe0) {
                 $c = substr($string, $i, 3);
                 $i += 2;
             } elseif ($n >= 0xc0) {
                 $c = substr($string, $i, 2);
                 $i++;
             }
             if (isset($map[$c])) {
                 $out .= $map[$c];
                 continue;
             } else {
                 if ($c >= UTF8_HANGUL_FIRST && $c <= UTF8_HANGUL_LAST) {
                     # Decompose a hangul syllable into jamo;
                     # hardcoded for three-byte UTF-8 sequence.
                     # A lookup table would be slightly faster,
                     # but adds a lot of memory & disk needs.
                     #
                     $index = ((ord($c[0]) & 0x0f) << 12
                              | (ord($c[1]) & 0x3f) << 6
                              | (ord($c[2]) & 0x3f))
                            - UNICODE_HANGUL_FIRST;
                     $l = intval($index / UNICODE_HANGUL_NCOUNT);
                     $v = intval(($index % UNICODE_HANGUL_NCOUNT) / UNICODE_HANGUL_TCOUNT);
                     $t = $index % UNICODE_HANGUL_TCOUNT;
                     $out .= "\xe1\x84" . chr(0x80 + $l) . "\xe1\x85" . chr(0xa1 + $v);
                     if ($t >= 25) {
                         $out .= "\xe1\x87" . chr(0x80 + $t - 25);
                     } elseif ($t) {
                         $out .= "\xe1\x86" . chr(0xa7 + $t);
                     }
                     continue;
                 }
             }
             $out .= $c;
         }
         return $out;
     }

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◆ loadData()

static UtfNormal::loadData ( )

static

Load the basic composition data if necessary.

Definition at line 232 of file UtfNormal.php.

References $utfCombiningClass.

Referenced by fastCombiningSort(), fastCompose(), fastDecompose(), NFD(), quickIsNFC(), and quickIsNFCVerify().

     {
         global $utfCombiningClass;
         if (!isset($utfCombiningClass)) {
             require_once(dirname(__FILE__) . '/UtfNormalData.inc');
         }
     }

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◆ NFC()

static UtfNormal::NFC ( $string )

static

Parameters

string $string

Returns: string

Definition at line 517 of file UtfNormal.php.

References fastCompose(), and NFD().

Referenced by cleanUp(), CleanUpTest\doTestDoubleBytes(), CleanUpTest\doTestTripleBytes(), toNFC(), and CleanUpTest\XtestAllChars().

     {
         return UtfNormal::fastCompose(UtfNormal::NFD($string));
     }

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◆ NFD()

static UtfNormal::NFD ( $string )

static

Parameters

string $string

Returns: string

Definition at line 528 of file UtfNormal.php.

References $utfCanonicalDecomp, fastCombiningSort(), fastDecompose(), and loadData().

Referenced by NFC(), and toNFD().

     {
         UtfNormal::loadData();
         global $utfCanonicalDecomp;
         return UtfNormal::fastCombiningSort(
             UtfNormal::fastDecompose($string, $utfCanonicalDecomp)
         );
     }

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◆ NFKC()

static UtfNormal::NFKC ( $string )

static

Parameters

string $string

Returns: string

Definition at line 543 of file UtfNormal.php.

References fastCompose(), and NFKD().

Referenced by toNFKC().

     {
         return UtfNormal::fastCompose(UtfNormal::NFKD($string));
     }

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◆ NFKD()

static UtfNormal::NFKD ( $string )

static

Parameters

string $string

Returns: string

Definition at line 554 of file UtfNormal.php.

References $utfCompatibilityDecomp, fastCombiningSort(), and fastDecompose().

Referenced by NFKC(), and toNFKD().

     {
         global $utfCompatibilityDecomp;
         if (!isset($utfCompatibilityDecomp)) {
             require_once('UtfNormalDataK.inc');
         }
         return UtfNormal::fastCombiningSort(
             UtfNormal::fastDecompose($string, $utfCompatibilityDecomp)
         );
     }

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◆ placebo()

static UtfNormal::placebo ( $string )

static

This is just used for the benchmark, comparing how long it takes to interate through a string without really doing anything of substance.

Parameters

string $string

Returns: string

Definition at line 829 of file UtfNormal.php.

References $i, and $out.

     {
         $len = strlen($string);
         $out = '';
         for ($i = 0; $i < $len; $i++) {
             $out .= $string[$i];
         }
         return $out;
     }

◆ quickIsNFC()

static UtfNormal::quickIsNFC ( $string )

static

Returns true if the string is definitely in NFC.

Returns false if not or uncertain.

Parameters

string $string a valid UTF-8 string. Input is not validated.

Returns: bool

Definition at line 247 of file UtfNormal.php.

References $c, $i, $n, $utfCombiningClass, and loadData().

Referenced by toNFC().

     {
         # ASCII is always valid NFC!
         # If it's pure ASCII, let it through.
         if (!preg_match('/[\x80-\xff]/', $string)) {
             return true;
         }
 
         UtfNormal::loadData();
         global $utfCheckNFC, $utfCombiningClass;
         $len = strlen($string);
         for ($i = 0; $i < $len; $i++) {
             $c = $string[$i];
             $n = ord($c);
             if ($n < 0x80) {
                 continue;
             } elseif ($n >= 0xf0) {
                 $c = substr($string, $i, 4);
                 $i += 3;
             } elseif ($n >= 0xe0) {
                 $c = substr($string, $i, 3);
                 $i += 2;
             } elseif ($n >= 0xc0) {
                 $c = substr($string, $i, 2);
                 $i++;
             }
             if (isset($utfCheckNFC[$c])) {
                 # If it's NO or MAYBE, bail and do the slow check.
                 return false;
             }
             if (isset($utfCombiningClass[$c])) {
                 # Combining character? We might have to do sorting, at least.
                 return false;
             }
         }
         return true;
     }

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◆ quickIsNFCVerify()

static UtfNormal::quickIsNFCVerify ( & $string )

static

Returns true if the string is definitely in NFC.

Returns false if not or uncertain.

Parameters

string $string a UTF-8 string, altered on output to be valid UTF-8 safe for XML.

Definition at line 291 of file UtfNormal.php.

References $base, $c, $i, $n, $out, $remaining, $start, $utfCombiningClass, down(), Sabre\Event\Loop\instance(), loadData(), UTF8_FFFE, UTF8_FFFF, UTF8_MAX, UTF8_OVERLONG_A, UTF8_OVERLONG_B, UTF8_OVERLONG_C, UTF8_REPLACEMENT, and UTF8_SURROGATE_FIRST.

Referenced by cleanUp().

     {
         # Screen out some characters that eg won't be allowed in XML
         $string = preg_replace('/[\x00-\x08\x0b\x0c\x0e-\x1f]/', UTF8_REPLACEMENT, $string);
 
         # ASCII is always valid NFC!
         # If we're only ever given plain ASCII, we can avoid the overhead
         # of initializing the decomposition tables by skipping out early.
         if (!preg_match('/[\x80-\xff]/', $string)) {
             return true;
         }
 
         static $checkit = null, $tailBytes = null, $utfCheckOrCombining = null;
         if (!isset($checkit)) {
             # Load/build some scary lookup tables...
             UtfNormal::loadData();
             global $utfCheckNFC, $utfCombiningClass;
 
             $utfCheckOrCombining = array_merge($utfCheckNFC, $utfCombiningClass);
 
             # Head bytes for sequences which we should do further validity checks
             $checkit = array_flip(array_map(
                 'chr',
                 array( 0xc0, 0xc1, 0xe0, 0xed, 0xef,
                            0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
                            0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff )
             ));
 
             # Each UTF-8 head byte is followed by a certain
             # number of tail bytes.
             $tailBytes = array();
             for ($n = 0; $n < 256; $n++) {
                 if ($n < 0xc0) {
                     $remaining = 0;
                 } elseif ($n < 0xe0) {
                     $remaining = 1;
                 } elseif ($n < 0xf0) {
                     $remaining = 2;
                 } elseif ($n < 0xf8) {
                     $remaining = 3;
                 } elseif ($n < 0xfc) {
                     $remaining = 4;
                 } elseif ($n < 0xfe) {
                     $remaining = 5;
                 } else {
                     $remaining = 0;
                 }
                 $tailBytes[chr($n)] = $remaining;
             }
         }
 
         # Chop the text into pure-ASCII and non-ASCII areas;
         # large ASCII parts can be handled much more quickly.
         # Don't chop up Unicode areas for punctuation, though,
         # that wastes energy.
         $matches = array();
         preg_match_all(
             '/([\x00-\x7f]+|[\x80-\xff][\x00-\x40\x5b-\x5f\x7b-\xff]*)/',
             $string,
             $matches
         );
 
         $looksNormal = true;
         $base = 0;
         $replace = array();
         foreach ($matches[1] as $str) {
             $chunk = strlen($str);
 
             if ($str[0] < "\x80") {
                 # ASCII chunk: guaranteed to be valid UTF-8
                 # and in normal form C, so skip over it.
                 $base += $chunk;
                 continue;
             }
 
             # We'll have to examine the chunk byte by byte to ensure
             # that it consists of valid UTF-8 sequences, and to see
             # if any of them might not be normalized.
             #
             # Since PHP is not the fastest language on earth, some of
             # this code is a little ugly with inner loop optimizations.
 
             $head = '';
             $len = $chunk + 1; # Counting down is faster. I'm *so* sorry.
 
             for ($i = -1; --$len;) {
                 if ($remaining = $tailBytes[$c = $str[++$i]]) {
                     # UTF-8 head byte!
                     $sequence = $head = $c;
                     do {
                         # Look for the defined number of tail bytes...
                         if (--$len && ($c = $str[++$i]) >= "\x80" && $c < "\xc0") {
                             # Legal tail bytes are nice.
                             $sequence .= $c;
                         } else {
                             if (0 == $len) {
                                 # Premature end of string!
                                 # Drop a replacement character into output to
                                 # represent the invalid UTF-8 sequence.
                                 $replace[] = array( UTF8_REPLACEMENT,
                                                     $base + $i + 1 - strlen($sequence),
                                                     strlen($sequence) );
                                 break 2;
                             } else {
                                 # Illegal tail byte; abandon the sequence.
                                 $replace[] = array( UTF8_REPLACEMENT,
                                                     $base + $i - strlen($sequence),
                                                     strlen($sequence) );
                                 # Back up and reprocess this byte; it may itself
                                 # be a legal ASCII or UTF-8 sequence head.
                                 --$i;
                                 ++$len;
                                 continue 2;
                             }
                         }
                     } while (--$remaining);
 
                     if (isset($checkit[$head])) {
                         # Do some more detailed validity checks, for
                         # invalid characters and illegal sequences.
                         if ($head == "\xed") {
                             # 0xed is relatively frequent in Korean, which
                             # abuts the surrogate area, so we're doing
                             # this check separately to speed things up.
 
                             if ($sequence >= UTF8_SURROGATE_FIRST) {
                                 # Surrogates are legal only in UTF-16 code.
                                 # They are totally forbidden here in UTF-8
                                 # utopia.
                                 $replace[] = array( UTF8_REPLACEMENT,
                                              $base + $i + 1 - strlen($sequence),
                                              strlen($sequence) );
                                 $head = '';
                                 continue;
                             }
                         } else {
                             # Slower, but rarer checks...
                             $n = ord($head);
                             if (
                                 # "Overlong sequences" are those that are syntactically
                                 # correct but use more UTF-8 bytes than are necessary to
                                 # encode a character. Naïve string comparisons can be
                                 # tricked into failing to see a match for an ASCII
                                 # character, for instance, which can be a security hole
                                 # if blacklist checks are being used.
                                    ($n < 0xc2 && $sequence <= UTF8_OVERLONG_A)
                                 || ($n == 0xe0 && $sequence <= UTF8_OVERLONG_B)
                                 || ($n == 0xf0 && $sequence <= UTF8_OVERLONG_C)
 
                                 # U+FFFE and U+FFFF are explicitly forbidden in Unicode.
                                 || ($n == 0xef &&
                                        ($sequence == UTF8_FFFE)
                                     || ($sequence == UTF8_FFFF))
 
                                 # Unicode has been limited to 21 bits; longer
                                 # sequences are not allowed.
                                 || ($n >= 0xf0 && $sequence > UTF8_MAX)) {
                                 $replace[] = array( UTF8_REPLACEMENT,
                                                     $base + $i + 1 - strlen($sequence),
                                                     strlen($sequence) );
                                 $head = '';
                                 continue;
                             }
                         }
                     }
 
                     if (isset($utfCheckOrCombining[$sequence])) {
                         # If it's NO or MAYBE, we'll have to rip
                         # the string apart and put it back together.
                         # That's going to be mighty slow.
                         $looksNormal = false;
                     }
 
                     # The sequence is legal!
                     $head = '';
                 } elseif ($c < "\x80") {
                     # ASCII byte.
                     $head = '';
                 } elseif ($c < "\xc0") {
                     # Illegal tail bytes
                     if ($head == '') {
                         # Out of the blue!
                         $replace[] = array( UTF8_REPLACEMENT, $base + $i, 1 );
                     } else {
                         # Don't add if we're continuing a broken sequence;
                         # we already put a replacement character when we looked
                         # at the broken sequence.
                         $replace[] = array( '', $base + $i, 1 );
                     }
                 } else {
                     # Miscellaneous freaks.
                     $replace[] = array( UTF8_REPLACEMENT, $base + $i, 1 );
                     $head = '';
                 }
             }
             $base += $chunk;
         }
         if (count($replace)) {
             # There were illegal UTF-8 sequences we need to fix up.
             $out = '';
             $last = 0;
             foreach ($replace as $rep) {
                 list($replacement, $start, $length) = $rep;
                 if ($last < $start) {
                     $out .= substr($string, $last, $start - $last);
                 }
                 $out .= $replacement;
                 $last = $start + $length;
             }
             if ($last < strlen($string)) {
                 $out .= substr($string, $last);
             }
             $string = $out;
         }
         return $looksNormal;
     }

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◆ toNFC()

static UtfNormal::toNFC ( $string )

static

Convert a UTF-8 string to normal form C, canonical composition.

Fast return for pure ASCII strings; some lesser optimizations for strings containing only known-good characters.

Parameters

string $string a valid UTF-8 string. Input is not validated.

Returns: string a UTF-8 string in normal form C

Definition at line 157 of file UtfNormal.php.

References NFC(), NORMALIZE_ICU, quickIsNFC(), and UNORM_NFC.

Referenced by ilWebDAVUtil\davDeslashify(), ilTree\getNodePathForTitlePath(), and ilStr\normalizeUtf8String().

     {
         if (NORMALIZE_ICU) {
             return utf8_normalize($string, UNORM_NFC);
         } elseif (UtfNormal::quickIsNFC($string)) {
             return $string;
         } else {
             return UtfNormal::NFC($string);
         }
     }

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◆ toNFD()

static UtfNormal::toNFD ( $string )

static

Convert a UTF-8 string to normal form D, canonical decomposition.

Fast return for pure ASCII strings.

Parameters

string $string a valid UTF-8 string. Input is not validated.

Returns: string a UTF-8 string in normal form D

Definition at line 176 of file UtfNormal.php.

References NFD(), NORMALIZE_ICU, and UNORM_NFD.

     {
         if (NORMALIZE_ICU) {
             return utf8_normalize($string, UNORM_NFD);
         } elseif (preg_match('/[\x80-\xff]/', $string)) {
             return UtfNormal::NFD($string);
         } else {
             return $string;
         }
     }

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◆ toNFKC()

static UtfNormal::toNFKC ( $string )

static

Convert a UTF-8 string to normal form KC, compatibility composition.

This may cause irreversible information loss, use judiciously. Fast return for pure ASCII strings.

Parameters

string $string a valid UTF-8 string. Input is not validated.

Returns: string a UTF-8 string in normal form KC

Definition at line 196 of file UtfNormal.php.

References NFKC(), NORMALIZE_ICU, and UNORM_NFKC.

     {
         if (NORMALIZE_ICU) {
             return utf8_normalize($string, UNORM_NFKC);
         } elseif (preg_match('/[\x80-\xff]/', $string)) {
             return UtfNormal::NFKC($string);
         } else {
             return $string;
         }
     }

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◆ toNFKD()

static UtfNormal::toNFKD ( $string )

static

Convert a UTF-8 string to normal form KD, compatibility decomposition.

This may cause irreversible information loss, use judiciously. Fast return for pure ASCII strings.

Parameters

string $string a valid UTF-8 string. Input is not validated.

Returns: string a UTF-8 string in normal form KD

Definition at line 216 of file UtfNormal.php.

References NFKD(), NORMALIZE_ICU, and UNORM_NFKD.

     {
         if (NORMALIZE_ICU) {
             return utf8_normalize($string, UNORM_NFKD);
         } elseif (preg_match('/[\x80-\xff]/', $string)) {
             return UtfNormal::NFKD($string);
         } else {
             return $string;
         }
     }

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The documentation for this class was generated from the following file:

include/Unicode/UtfNormal.php

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ cleanUp()

◆ fastCombiningSort()

◆ fastCompose()

◆ fastDecompose()

◆ loadData()

◆ NFC()

◆ NFD()

◆ NFKC()

◆ NFKD()

◆ placebo()

◆ quickIsNFC()

◆ quickIsNFCVerify()

◆ toNFC()

◆ toNFD()

◆ toNFKC()

◆ toNFKD()