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<?php var_dump($r = idn_to_ascii('Bücher.de', IDNA_USE_STD3_RULES, INTL_IDNA_VARIANT_UTS46, $info)); var_dump($info); var_dump(idn_to_utf8($r, IDNA_USE_STD3_RULES, INTL_IDNA_VARIANT_UTS46, $info)); var_dump($info);
Output for git.master, git.master_jit, rfc.property-hooks
string(16) "xn--bcher-kva.de" array(3) { ["result"]=> string(16) "xn--bcher-kva.de" ["isTransitionalDifferent"]=> bool(false) ["errors"]=> int(0) } string(10) "bücher.de" array(3) { ["result"]=> string(10) "bücher.de" ["isTransitionalDifferent"]=> bool(false) ["errors"]=> int(0) }

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