Validate Email Address

/ Published in: PHP
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E-mail validation is perhaps the most used validation in web forms, this code will validate email address and also optionally check the MX records of the domain provided in email address to make email validation more robust.

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  1. function is_valid_email($email, $test_mx = false)
  2. {
  3. if(eregi("^([_a-z0-9-]+)(\.[_a-z0-9-]+)*@([a-z0-9-]+)(\.[a-z0-9-]+)*(\.[a-z]{2,4})$", $email))
  4. if($test_mx)
  5. {
  6. list($username, $domain) = split("@", $email);
  7. return getmxrr($domain, $mxrecords);
  8. }
  9. else
  10. return true;
  11. else
  12. return false;
  13. }

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