NULL
__CLASS__
__FILE__
__FUNCTION__
__LINE__
__METHOD__
abstract
and
as
break
case
catch
cfunction
class
clone
const
continue
declare
default
do
else
elseif
enddeclare
endfor
endforeach
endif
endswitch
endwhile
extends
false
final
for
foreach
function
global
if
implements
interface
new
null
old_function
or
parent
private
protected
public
return
self
static
switch
this
throw
true
try
use
var
while
xor