SYNOPSIS
int closurep(mixed)
DESCRIPTION
Returns 1 if the argument is a closure.
HISTORY
Introduced in 3.2@70
SEE ALSO
clonep(E), floatp(E), mappingp(E), objectp(E), intp(E),
referencep(E), pointerp(E), stringp(E), symbolp(E), structp(E)