is_set

This function determines whether the provided value is a set or not.

This function does not generate an event.

This function has a deprecated alias isset which will be removed in the next minor release.

Function

is_set(value)

Arguments

Argument Type Description
value any (required) The value to be tested.

Return value

Returns true if the given value is a set, else it returns false.

Example

This code shows some return values for is_set():

[
    is_set( [] ),
    is_set( set() ),
];

Return value in JSON format

[
    false,
    true
]