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<?php $subject = '"Joe Smith"<jsmith@example.com>, kjones@aol.com; someoneelse@nowhere.com, mjane@gmail.com'; preg_match_all('^(?:"?([^@"]+)"?\s)?<?([^>]+@[^>]+)>?$', $subject, $result, PREG_SET_ORDER); var_dump($result);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match_all(): Unknown modifier '@' in /in/RMoIS on line 5 NULL

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