Kohana comes with many static "helper" functions to make certain tasks easier.
You can make your own helpers by simply making a class and putting it in the
classes directory, and you can also extend any helper to modify or add new functions using transparent extension.
Arr - Array functions. Get an array key or default to a set value, get an array key by path, etc.
CLI - Parse command line options.
Date - Useful date functions and constants. Time between two dates, convert between am/pm and military, date offset, etc.
Feed - Parse and create RSS feeds.
File - Get file type by mime, split and merge a file into small pieces.
Form - Create HTML form elements.
HTML - Useful HTML functions. Encode, obfuscate, create script, anchor, and image tags, etc.
I18n - Internationalization helper for creating multilanguage sites.
Inflector - Change a word into plural or singular form, camelize or humanize a phrase, etc.
Kohana - The Kohana class is also a helper. Debug variables (like print_r but better), file loading, etc.
Num - Provides locale aware formating and english ordinals (th, st, nd, etc).
Request - Get the current request url, create expire tags, send a file, get the user agent, etc.
Route - Create routes, create an internal link using a route.
Text - Autolink, prevent window words, convert a number to text, etc.
URL - Create a relative or absolute URL, make a URL-safe title, etc.
UTF8 - Provides multi-byte aware string functions like strlen, strpos, substr, etc.
Upload - Helper for uploading files from a form.