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<?php preg_match_all('/(?:"?([^"]*)"?\s)?(?:<?(.+@[^>]+)>?)/', 'John <johndoe@example.com>', $name_and_tags); var_dump($name_and_tags);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(3) { [0]=> array(1) { [0]=> string(26) "John <johndoe@example.com>" } [1]=> array(1) { [0]=> string(4) "John" } [2]=> array(1) { [0]=> string(19) "johndoe@example.com" } }