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<?php $test = 'Joe Doe <doe@example.com>, postmaster@example.com, root, "Bob Smith" <bob@smith.com>'; $regex = '/[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&\'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?/'; print preg_match_all($regex, $test , $matches); print_r($matches);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_match_all(): Unknown modifier '=' in /in/YZTnN on line 4

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