PHP list all files in directory

[Rentopenteeft]

I have seen functions to list all file in a directory but how can I list all the files in sub-directories too, so it returns an array like?\[code\]$files = files("foldername");\[/code\]So \[code\]$files\[/code\] is something similar to\[code\]array("file.jpg", "blah.word", "name.fileext")\[/code\]