MACROMEDIA COLDFUSION 4.5-CFML LANGUAGE, Reference

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Chapter 1: ColdFusion Tags 151
CFPARAM
CFPARAM is used to test for a parameter’s existence, and optionally test its data type,
and provide a default value if one is not assigned.
Syntax
<CFPARAM NAME="param_name"
TYPE="data_type">
DEFAULT="value">
NAME
The name of the parameter you are testing (such as "Client.Email " or
"Cookie.BackgroundColor "). If you omit the DEFAULT attribute, an error occurs if
the specified parameter does not exist.
TYPE
Optional. The type of parameter that is required. The default value is "any. "
DEFAULT
Optional. Default value to set the parameter to if it does not exist.
Type Values
Type Value Description
any any value.
array any array value.
binary a binary value.
boolean a Boolean value.
date a date-time value.
numeric a numeric value.
query a query object.
string a string value or a single character.
struct a structure.
UUID a Universally Unique Identifier (UUID)
formatted as ‘XXXXXXXX-XXXX-XXXX-
XXXXXXXXXXXXXXX’ where ‘X’ stands for a
hexadecimal digit (0-9 or A-F). See
CreateUUID .
variableName a valid variable name.