just iterate and change the string of the post array
PHP Code:
<?php
$bad_data = array('03-', '04-', '05-', '06-', '07-', '08-', '09-', '012', '013', '016', '017', '019', 'E10', 'E20', 'E30', 'RM1', 'RM2', 'RM3', 'RM4', 'RM5', 'RM6', 'RM7', 'RM8', 'RM9', '012-', '013-', '016-', '017-', '019-');
for ($i=1; $i<5; $i++) {
if (in_array(strtoupper($_POST['Text_Box_'.$i]), $bad_data)) {
die('This keyword is disallowed. Please click the BACK button of your browser & change your search criteria to something else. Thanks :-)');
}
}
?>