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PHP regular verification email function

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2016-07-25 08:55:011459browse
  2. function isemail($email) {
  3. return strlen($email) > 8 && preg_match("/^[-_+.[:alnum:]]+@((([ [:alnum:]]|[[:alnum:]][[:alnum:]-]*[[:alnum:]]).)+([a-z]{2,4})|(([0- 9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5] ).){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[ 2][5][0-5]))$/i", $email);
  4. }
  5. if(!isemail($_POST['email'])) {
  6. echo "Sorry, the verification email address is incorrect! ";
  7. exit();
  8. }
  9. ?>
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