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<?php $characters = ["A", "a", "Φ", "φ", "1", ord("a")]; foreach ($characters as $character) { var_dump(IntlChar::toupper($character)); } ?>
Output for git.master, git.master_jit, rfc.property-hooks
string(1) "A" string(1) "A" string(2) "Φ" string(2) "Φ" string(1) "1" int(65)

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