Is the code you show above what you placed in the theme? Then you really need to get some PHP knowledge. Generally we do not have the resources to train on PHP. There are other sites for that. But your parameters to the function are not proper PHP syntax, so you are getting a PHP syntax error.
I am copied code from the link that was sent in the previous post. I know php but not enough I need this for a client who wants this gallery on your site and wants to show the latest pictures added. I searched the forum and ask how to use this feature, but unfortunately I found nothing. I would be grateful if someone help me about how to write code to display the latest pictures added ... Would you sir can help me. Now if we started to learn php should be a lot of time because your back if you please give me the code and show you how to write .. Thank you once again for your cooperation
The code from that link is simply a prototype, outlining how to use that function. Beyond that, as sbillard says, we really don't provide support for such PHP basics. There are plenty of resources on the internet that should help you solve your problem.