From the blog:
ftp_rmdirr() allows the deletion of whole directory trees on remote servers via FTP.
rmdirr() allows the deleting of a folder, along with the folders contents.
mkdirr allows you to create whole directory trees independent of what folders exist in the path.
copyr can be used to copy a file, or recursively copy a folder and its contents.
mysql2unixtime() converts MySQL timestamps to unix timestamps
str_rand() provides a quick wrapper for customised random string output.
mysql_draw_table() outputs a MySQL result set as a HTML table.
time_duration() is a flexible function for making time periods readable.
PHP_Highlight uses PHP’s built in tokenizer to provide reliable syntax highlighting for PHP code when server-side highlighting is required.