Function Description
DirectoryExists Determines whether a directory exists.
FileExists Determines whether a file exists.
FileIsEOF Determines whether ColdFusion has reached the end of a file while reading the file.
IIf Evaluates a Boolean conditional dynamic expression.
IsArray Determines whether a value is an array.
IsBinary Determines whether a value is stored as binary data.
IsBoolean Returns true when a value is converted to Boolean.
IsClosure Checks if an object is a closure.
IsCustomFunction Determines whether an object is a custom function.
IsDate Determines whether a string or object can be converted to a date/time value.
IsDateObject Determines whether a value is a date/time object.
IsDDX Determines whether a DDX file exists or if a string contains DDX instructions.
IsDebugMode Determines whether debugging output is enabled.
IsDefined Evaluates a string value to determine if the value named in the string exists.
isFileObject Determines whether a value is a file object.
IsInstanceOf Determines if an object is an instance of a ColdFusion component or interface.
isIPv6 Determines whether the host supports IPv6.
IsJSON Evaluates if a string is in a valid JSON format.
isLocalHost Determines if the specified IP address is the localhost. Supports both IPv4 and IPv6 addresses.
IsK2ServerABroker Deprecated Function
IsK2ServerDocCountExceeded Deprecated Function
IsK2ServerOnline Deprecated Function
IsLeapYear Determines whether a year is a leap year.
IsNull Returns true if an object is null.
IsNumeric Returns true if a string is converted to a numeric value.
IsNumericDate Returns true if a real number is a representation of a date/time object.
IsObject Determines if a value is an object.
IsPDFArchive Determines if a PDF document is archived or not.
IsPDFFile Determines if a PDF file is valid.
IsPDFObject Determines if a value is a PDF object.
IsQuery Determines if a value is a query.
IsSimpleValue Determines the type of a value.
IsStruct Determines if a variable is a structure.
IsUserInAnyRole Determines if an authenticated user belongs to a role in a list of roles.
IsValid Determines if a value satisfies a validation or data type rule.
IsWDDX Determines if a value is a well-formed WDDX packet.
IsXML Determines if a string is a well-formed XML text.
IsXmlAttribute Determines if a function parameter is an XML DOM attribute node.
IsXmlDoc Determines if a function parameter is a ColdFusion XML document object.
IsXmlElem Determines if a function parameter is a an XML document object element.
IsXmlNode Determines if a function parameter is an XML document object node.
IsXmlRoot Determines if a function parameter is the root element of an XML document object.
LSIsCurrency Determines if a string is a valid representation of a currency amount in the current locale.
LSIsDate Determines if a string is a valid representation of a date/time value in the current locale.
LSIsNumeric Determines if a string is a valid representation of a number in the current locale.
StructIsEmpty Determines if a structure contains values.
StructKeyExists Determines if a key is present in a structure.