So
PHP
4
will
now
warn
you
whenever
you
use
unquoted
string
constants
as
for
example
in
$HTTP_SERVER_VARS[
REQUEST_METHOD
]
.
Changing
it
to
$HTTP_SERVER_VARS[
'REQUEST_METHOD'
]
will
make
the
parser
happy
and
greatly
improve
the
style
and
security
of
your
code
.