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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);

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56.2 ms | 402 KiB | 5 Q