recognizing spaces

I am programming folder directory, and have an iput form where users can name and then create a directory. (At present this is on my windows machine at home) I have created functions that creates an array of all folders in the current directory, and then if you go into a folder, creates an array of files in the folder. you you can view or delete the files. When creating a folder, if the user inputs a name with a space in it - ie "New Folder", then it creates, the folder and reads its contents successfully. However when I try to delete (using unlink) then I get a meaasge sying that the fike doesnt not exist and recognizes the name "New" as opposed to "New Folder". So what I need to do is either recognize the space in the name, make the adjustment to allow files to be deleted, or I need to prevent users using a name with a space. How would I recognize this space? Thanks