Вие сте на: Unicode character properties


Unicode character properties:
Unicode character properties - Manual in BULGARIAN
Unicode character properties - Manual in GERMAN
Unicode character properties - Manual in ENGLISH
Unicode character properties - Manual in FRENCH
Unicode character properties - Manual in POLISH
Unicode character properties - Manual in PORTUGUESE

Последни търсения:
regexp functions , include functions , variable functions , post functions




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PCRE regex syntax
PHP Manual

Unicode character properties

Since PHP 4.4.0 and 5.1.0, three additional escape sequences to match generic character types are available when UTF-8 mode is selected. They are:

\p{xx}
a character with the xx property
\P{xx}
a character without the xx property
\X
an extended Unicode sequence

The property names represented by xx above are limited to the Unicode general category properties. Each character has exactly one such property, specified by a two-letter abbreviation. For compatibility with Perl, negation can be specified by including a circumflex between the opening brace and the property name. For example, \p{^Lu} is the same as \P{Lu}.

If only one letter is specified with \p or \P, it includes all the properties that start with that letter. In this case, in the absence of negation, the curly brackets in the escape sequence are optional; these two examples have the same effect:

      \p{L}
      \pL
     
Supported property codes
COther
CcControl
CfFormat
CnUnassigned
CoPrivate use
CsSurrogate
LLetter
LlLower case letter
LmModifier letter
LoOther letter
LtTitle case letter
LuUpper case letter
MMark
McSpacing mark
MeEnclosing mark
MnNon-spacing mark
NNumber
NdDecimal number
NlLetter number
NoOther number
PPunctuation
PcConnector punctuation
PdDash punctuation
PeClose punctuation
PfFinal punctuation
PiInitial punctuation
PoOther punctuation
PsOpen punctuation
SSymbol
ScCurrency symbol
SkModifier symbol
SmMathematical symbol
SoOther symbol
ZSeparator
ZlLine separator
ZpParagraph separator
ZsSpace separator

Extended properties such as "Greek" or "InMusicalSymbols" are not supported by PCRE.

Specifying case-insensitive (caseless) matching does not affect these escape sequences. For example, \p{Lu} always matches only upper case letters.

The \X escape matches any number of Unicode characters that form an extended Unicode sequence. \X is equivalent to (?>\PM\pM*).

That is, it matches a character without the "mark" property, followed by zero or more characters with the "mark" property, and treats the sequence as an atomic group (see below). Characters with the "mark" property are typically accents that affect the preceding character.

Matching characters by Unicode property is not fast, because PCRE has to search a structure that contains data for over fifteen thousand characters. That is why the traditional escape sequences such as \d and \w do not use Unicode properties in PCRE.


PCRE regex syntax
PHP Manual

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