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The Normalizer class

(PHP 5 >= 5.3.0, PECL intl >= 1.0.0)

Введение

Normalization is a process that involves transforming characters and sequences of characters into a formally-defined underlying representation. This process is most important when text needs to be compared for sorting and searching, but it is also used when storing text to ensure that the text is stored in a consistent representation.

The Unicode Consortium has defined a number of normalization forms reflecting the various needs of applications:

  • Normalization Form D (NFD) - Canonical Decomposition
  • Normalization Form C (NFC) - Canonical Decomposition followed by Canonical Composition
  • Normalization Form KD (NFKD) - Compatibility Decomposition
  • Normalization Form KC (NFKC) - Compatibility Decomposition followed by Canonical Composition
The different forms are defined in terms of a set of transformations on the text, transformations that are expressed by both an algorithm and a set of data files.


Обзор классов


Normalizer {
/* Методы */
static bool isNormalized ( string $input [, string $form = Normalizer::FORM_C ] )
static string normalize ( string $input [, string $form = Normalizer::FORM_C ] )
}

Предопределенные константы

The following constants define the normalization form used by the normalizer:

Normalizer::FORM_C (string) - Normalization Form C (NFC) - Canonical Decomposition followed by Canonical Composition

Normalizer::FORM_D (string) - Normalization Form D (NFD) - Canonical Decomposition

Normalizer::FORM_KC (string) - Normalization Form KC (NFKC) - Compatibility Decomposition, followed by Canonical Composition

Normalizer::FORM_KD (string) - Normalization Form KD (NFKD) - Compatibility Decomposition

Normalizer::NONE (string) - No decomposition/composition

Normalizer::OPTION_DEFAULT (string) - Default normalization options



Содержание



Смотрите также

Описание класса normalizer, примеры использования класса normalizer.

Описание на ru2.php.net
Описание на php.ru

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