StructKeyExists()

Determines whether a specific key is present in a structure.

StructKeyExists( struct=struct, key=string );

Returns: Boolean

Argument Description
struct
struct, required

Name of structure to test

Alias: structure, object
key
string, required

Key to test

Usage Notes

Using this function to check if a session variable exists, will create a session, if it doesn't already exist.

With Lucee 6.2, we have introduced SessionExists() which can be safely used to check if a session has been created

Examples

Non-Member Function

animals = {
	cow: "moo",
	pig: "oink",
	cat: "meow",
	bird: "chirp"
};

// Check to see if key exists in struct
if (
	StructKeyExists(animals, "snail")
) {
	echo("There is a snail in 'animals'");
} else {
	echo("No snail exists in 'animals'");
}

See also