Requirements
These
functions
are
available
as
part
of
the
standard
module
,
which
is
always
available
.
Installation
There
is
no
installation
needed
to
use
these
functions
,
they
are
part
of
the
PHP
core
.
Predefined Constants
Tämä
laajennus
ei
määrittele
yhtäkään
vakiota
.