SYNOPSIS
        int closurep(mixed)

DESCRIPTION
        Returns 1 if the argument is a closure.

HISTORY
        Introduced in 3.2@70

SEE ALSO
        bytesp(E), clonep(E), floatp(E), mappingp(E), objectp(E), intp(E),
        referencep(E), pointerp(E), stringp(E), symbolp(E), structp(E)