verifyRequestParameter

gistfile1.aw

function verifyRequestParameter($param, $min = null, $max = null, $send_resp = true) {
    // make sure the parameter was passed
    if (!array_key_exists($param, $_REQUEST)) {
        $error_message =  "Missing {$param} parameter";
    } else {
        // if we have a max or min value make sure the parameter is in range
        if (isset($min)) {
            if ($_REQUEST[$param] < $min) {
                $error_message = "Parameter {$param} not greater than accepted minimum value.";
            }
        }
        if (isset($max)) {
            if ($_REQUEST[$param] > $max) {
                $error_message = "Parameter {$param} not less than accepted maximum value.";
            }
        }
    }
    
    // if we have an error message then send that back
    // and return false
    if (isset($error_message)) {
        if ($send_resp) {
            // only send the json response if the calling function asked us to
            response(json_encode(array(
                'error' => true,
                'message' => $error_message
            )));
        }
        return false;
    } else {
        return true;
    }
}