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<?php $domains = [ 'danielabruña.com', 'xn--fagualpez-b7a.com', 'laconspiracióndelcastellano.com', ]; foreach ($domains as $domain) { $needs_encoding = mb_detect_encoding($domain, ['ASCII', 'UTF-8'], true) === 'UTF-8'; var_dump($domain, $needs_encoding); }
Output for git.master, git.master_jit, rfc.property-hooks
string(17) "danielabruña.com" bool(true) string(21) "xn--fagualpez-b7a.com" bool(false) string(32) "laconspiracióndelcastellano.com" bool(true)

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