Rules syntax could be found at https://unicode-org.github.io/icu/userguide/transforms/general/#overview
(PHP 5 >= 5.4.0, PHP 7, PHP 8, PECL intl >= 2.0.0)
Transliterator::createFromRules -- transliterator_create_from_rules — Create transliterator from rules
Stile orientato agli oggetti
$rules, int $direction = Transliterator::FORWARD): ?TransliteratorStile procedurale
$rules, int $direction = Transliterator::FORWARD): ?TransliteratorCreates a Transliterator from rules.
Questa funzione, al momento non è documentata; è disponibile soltanto la lista degli argomenti.
rulesThe rules as defined in Transform Rules Syntax of UTS #35: Unicode LDML.
directionThe direction, defaults to Transliterator::FORWARD. May also be set to Transliterator::REVERSE.
Returns a Transliterator object on success,
or null on failure.
Rules syntax could be found at https://unicode-org.github.io/icu/userguide/transforms/general/#overview// string normalization example
$transliterator = Transliterator::createFromRules(''
. ':: [^йЙ];'
. ':: NFD;'
. ' [:White_Space:]+ > \' \';'
. ':: Upper();'
. ':: [:Nonspacing Mark:] Remove;'
. ':: NFC;', Transliterator::FORWARD);
$str = 'ручей příklad';
echo str_replace('й', 'Й', $transliterator->transliterate($str));
// result:
// РУЧЕЙ PRIKLAD