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<?php preg_match('/\bПривіт\W+(?:\w+\W+){0,6}?світу\b/ui', 'Привіт, світу!', $matches); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> string(24) "Привіт, світу" }

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