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<?php $tsl = Transliterator::createFromRules(':: NFC ; [[:L:]] { [[:L:]]+ > ; :: Upper() ; ::[^[:L:]] Remove() ;'); echo $tsl->transliterate("c'est l'été");
Output for 8.1.29 - 8.1.33, 8.2.19 - 8.2.29, 8.3.5 - 8.3.25, 8.4.1 - 8.4.12
CELÉ

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