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PHP email validation function

// Simple function to check if an given email adddress is valid

function is_valid_email($email) {
  $result = TRUE;
  if(!eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$", $email)) {
    $result = FALSE;
  }
  return $result;
}
to php email validation by mvidberg on Feb 17, 2006
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