com.caucho.quercus.lib.spl
Interfaces 
ArrayAccess
Countable
Iterator
IteratorAggregate
OuterIterator
RecursiveIterator
SeekableIterator
Serializable
Traversable
Classes 
AbstractIteratorImpl
ArrayAccessDelegate
ArrayIterator
ArrayObject
CountableDelegate
DirectoryIterator
FilesystemIterator
IteratorAggregateDelegate
IteratorDelegate
IteratorDelegate.EntryImpl
IteratorDelegate.EntryIterator
IteratorDelegate.KeyIterator
IteratorDelegate.ValueIterator
RecursiveDirectoryIterator
RecursiveIteratorIterator
SplFileInfo
SplFileObject
SplModule