I have a form that is pulling data from my db and displaying it on the form based on which user is logged in. The first form field is the user's name. I have their first and last name displaying in the form, but I need to add a space in between the first and last name.

Here is the code:

```
<input type="text" name="form-partner-name" placeholder="Partner name" class="form-partner-name form-control" id="form-partner-name" 
                                                value="<?php echo $_SESSION['user']['firstName'], $_SESSION['user']['lastName']?>">

```

How do I add a space between the first and last name?