INT: An integer,
UINT: An unsigned integer,
FLOAT: A floating point number,
BOOLEAN: A boolean value,
WORD: A string containing A-Z or underscores only (not case sensitive),
ALNUM: A string containing A-Z or 0-9 only (not case sensitive),
CMD: A string containing A-Z, 0-9, underscores, periods or hyphens (not case sensitive),
BASE64: A string containing A-Z, 0-9, forward slashes, plus or equals (not case sensitive),
STRING: A fully decoded and sanitised string (default),
HTML: A sanitised string,
ARRAY: An array,
PATH: A sanitised file path,
USERNAME: Do not use (use an application specific filter),
RAW: The raw string is returned with no filtering,
unknown: An unknown filter will act like STRING. If the input is an array it will return an array of fully decoded and sanitised strings.
More info from source code: libraries/joomla/filter/input.php
Example for integer filter:
<field
name="integer_field"
type="text"
filter="integer"
label="Enter an integer value"
description="Enter an integer value" />
Example for integer filter from source code: administrator/components/com_banners/config.xml
