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<?php preg_match('/^(?=.*?[A-Z])(?=.*?[0-9])[a-zA-Z0-9]{8,}/u', 'A1234azert', $matches); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { [0]=> string(10) "A1234azert" }

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