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Decision functions
Last update:
May 18, 2026
| 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. |
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