File System Functions

basename
dirname
expand_path
file_append
file_exists
file_get_contents
file_mtime
file_put_contents
cwd_get
ls
mkdir
path_join
cwd_set
shell_escape
shell_exec
file_unlink
zip_create
zip_list
zip_read
zip_extract
gz_compress
gz_uncompress
server_start_http
server_stop
