VERIFY-EMAIL-ADDRESS.PHP

Verifies that a string looks like a real email address. It may return false for some valid exotic email addresses. To correct this you may want to edit validate-string to accept more characters.

<?
function Verify_Email_Address($email_address)
         {
         //Assumes that valid email addresses consist of user_name@domain.tld
         $at = strpos($email_address, "@");
         $dot = strrpos($email_address, ".");

         if($at === false ||
            $dot === false ||
            $dot <= $at + 1 ||
            $dot == 0 ||
            $dot == strlen($email_address) - 1)
            return(false);

         $user_name = substr($email_address, 0, $at);
         $domain_name = substr($email_address, $at + 1, strlen($email_address));

         if(Validate_String($user_name) === false ||
            Validate_String($domain_name) === false)
            return(false);

         return(true);
         }
?>