note 95324 deleted from function.filter-var by danbrown

Note Submitter: RPaseur at NationalPres dot org ---- <?php // RAY_email_validation.php error_reporting(E_ALL); // A FUNCTION TO TEST FOR A VALID EMAIL ADDRESS, RETURN TRUE OR FALSE function check_valid_email($email) { // IF PHP 5.2 OR ABOVE, WE CAN USE THE FILTER // MAN PAGE: http://us3.php.net/manual/en/intro.filter.php if (strnatcmp(phpversion(),'5.2') >= 0) { if(filter_var($email, FILTER_VALIDATE_EMAIL) === FALSE) return FALSE; } else { $regex = '/^[A-Z0-9_-][A-Z0-9._-]*@([A-Z0-9][A-Z0-9-]*\.)+[A-Z\.]{2,6}$/i'; if (!preg_match($regex, $email)) return FALSE; } // FILTER or PREG DOES NOT TEST IF THE DOMAIN OF THE EMAIL ADDRESS IS ROUTABLE $domain = explode('@', $email); if ( checkdnsrr($domain[1],"MX") || checkdnsrr($domain[1],"A") ) return TRUE; // EMAIL NOT ROUTABLE return FALSE; } // DEMONSTRATE THE FUNCTION IN ACTION if (!empty($_GET["e"])) { $e = $_GET["e"]; if (check_valid_email($e)) { echo "<br/>VALID: $e \n"; } else { echo "<br/>BOGUS: $e \n"; } } // END OF PHP - PUT UP THE FORM ?> <form method="get"> TEST A STRING FOR A VALID EMAIL ADDRESS: <input name="e" /> <input type="submit" /> </form>