A function that will either read a file or read a string, and parse a random line from it. Very simple.

Checks to see if a file or folder exists
The fFile variable determines whether you're
looking for a File (True) or Folder(False)
The strName variable holds the fully qualified
path you're looking For

this function returns the aggregated size
of all files in a directory and its subdirectories

Retrieve information about a file

Check the attributes of a file or folde

Software Requirements:

Crypt_HMAC:
http://pear.php.net/package/Crypt_HMAC
HTTP_REQUEST:
http://pear.php.net/package/HTTP_Request
PEAR:
http://pear.php.net/

Two very usefull functions to have around.

(note: dollarfy requires commify to work)

This php script provides a unique random key with 32 characters and can be used to avoid the system to pass some primary keys across the url, by example.

Function that splits a given string into sections based on the allowed length for a section. Does not split words up. Splits string on Space character (can be set to another character)

Takes a given directory and lists all the files and folders under it, including sub folders. Resulting array contains associative (folders) and indexed (files) elements. Doesn't return "." and ".."