No namespace

Classes
ArrayIterator
CachingIterator
Closure
DateInterval
DatePeriod
DateTime
DateTimeImmutable
DateTimeZone
Generator
IteratorIterator
PDO
PDOStatement
ReflectionAttribute
ReflectionClass
ReflectionClassConstant
ReflectionExtension
ReflectionFunction
ReflectionFunctionAbstract
ReflectionMethod
ReflectionParameter
ReflectionProperty
ReflectionType
SplFileInfo
SplFileObject
stdClass
WeakMap

Interfaces
ArrayAccess
BackedEnum
Countable
DateTimeInterface
Iterator
IteratorAggregate
JsonSerializable
OuterIterator
RecursiveIterator
Reflector
SeekableIterator
Serializable
SessionHandlerInterface
Stringable
Throwable
Traversable
UnitEnum

Enums
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Exceptions
BadFunctionCallException
BadMethodCallException
Error
Exception
InvalidArgumentException
JsonException
LogicException
OutOfBoundsException
PDOException
ReflectionException
RuntimeException
TypeError
UnexpectedValueException
ValueError

Namespaces
Baril
Carbon
Ds
Illuminate
Laravel
League
Psr
Ramsey
Symfony
none