php predefined functions

53.List out the predefined classes in PHP?
Predefined Classes
1. Standard Defined Classes
These classes are defined in the standard set of functions included in the PHP build.

a. Directory
The class from which dir() is instantiated.

b.stdClass

2.Ming Defined Classes
These classes are defined in the Ming extension, and will only be available when that extension has either been compiled into PHP or dynamically loaded at runtime.

a.swfshape

b. swffill

c. swfgradient

d. swfbitmap

e. swftext

f. swftextfield

g. swffont

h. swfdisplayitem

i. swfmovie

j. swfbutton

k. swfaction

l. swfmorph

m. swfsprite