I have some PHP code in a project I'm working on that uses PHP's round function. On my localhost, I don't include any quotes around my mode argument, stating it as just PHP\_ROUND\_HALF\_DOWN. However, when pushing to my server I get the error message:

```
Use of undefined constant PHP_ROUND_HALF_DOWN - assumed 'PHP_ROUND_HALF_DOWN'
Warning (2): Wrong parameter count for round() [APP/views/helpers/time_left.php, line 14]

```

Now, when I add the single quotes to the mode argument, the first error goes away, however the "wrong parameter count" remains. I'm calling the function as follows:

```
$days = round(($difference/$day), 0, PHP_ROUND_HALF_DOWN);

```

Thanks for any and all help!