<CFPARAM NAME="param_name"
    TYPE="data_type">
    DEFAULT="value">

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.

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."

Type Values
Type Value Description
any any value.
array any array 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.

DEFAULT

Optional. Default value to set the parameter to if it does not exist.