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<?php $mail = "pietjepuk+werk@gmail.com"; if (filter_var($mail, FILTER_VALIDATE_EMAIL)) { echo 'VALID'; } else { echo 'NOT VALID'; } if(preg_match("/^[A-Za-z0-9\_.-]+@[A-Za-z0-9\_-]+.[A-Za-z0-9\_-]+.*/",$mail)) { echo 'VALID'; } else { echo 'NOT VALID'; }

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