App Engine PHP SDK  v1 rev.445
The PHP runtime is available as an experimental Preview feature.
Class Hierarchy
This inheritance list is sorted roughly, but not completely, alphabetically:
[detail level 123]
 Cgoogle\appengine\datastore\v4\PropertyExpression\AggregationFunction
 Cgoogle\appengine\CompositeImageOptions\ANCHOR
 Cgoogle\appengine\testing\ApiCallArguments
 Cgoogle\appengine\runtime\ApiProxy
 Cgoogle\appengine\runtime\ApiProxyBase
 Cgoogle\appengine\api\app_identity\AppIdentityService
 Cgoogle\appengine\api\log\AppLogLine
 Cgoogle\appengine\util\ArrayUtil
 Cgoogle\appengine_datastore_v3\PutRequest\AutoIdPolicy
 Cgoogle\appengine\api\mail\BaseMessage
 Cgoogle\appengine\runtime\ClassLoader
 Cgoogle\appengine\ext\cloud_storage_streams\CloudStorageClient
 Cgoogle\appengine\ext\cloud_storage_streams\CloudStorageStreamWrapper
 Cgoogle\appengine\api\cloud_storage\CloudStorageTools
 Cgoogle\appengine\datastore\v4\PartitionId\Constants
 Cgoogle\appengine\files\FileContentType\ContentType
 Cgoogle\net\Decoder
 Cgoogle\appengine\MemcacheDeleteResponse\DeleteStatusCode
 Cgoogle\appengine_datastore_v3\Query\Order\Direction
 Cgoogle\appengine\MemcacheIncrementRequest\Direction
 Cgoogle\appengine\datastore\v4\PropertyOrder\Direction
 Cstorage_onestore_v3\Index\Property\Direction
 Cgoogle\appengine\runtime\DirectUploadHandler
 Cgoogle\net\Encoder
 Cgoogle\appengine\UserServiceError\ErrorCode
 Cgoogle\appengine\MailServiceError\ErrorCode
 Cgoogle\appengine\MemcacheServiceError\ErrorCode
 Cgoogle\appengine_datastore_v3\Error\ErrorCode
 Cgoogle\appengine\AppIdentityServiceError\ErrorCode
 Cgoogle\appengine\datastore\v4\Error\ErrorCode
 Cgoogle\appengine\files\FileServiceErrors\ErrorCode
 Cgoogle\appengine\ModulesServiceError\ErrorCode
 Cgoogle\appengine\ImagesServiceError\ErrorCode
 Cgoogle\appengine\TaskQueueServiceError\ErrorCode
 Cgoogle\appengine\ext\remote_api\RpcError\ErrorCode
 Cgoogle\appengine\BlobstoreServiceError\ErrorCode
 Cgoogle\appengine\LogServiceError\ErrorCode
 Cgoogle\appengine\URLFetchServiceError\ErrorCode
 CException
 Cstorage_onestore_v3\Property\FtsTokenizationOption
 Cgoogle\appengine_datastore_v3\Query\Hint
 Cgoogle\appengine\ext\cloud_storage_streams\HttpResponse
 Cgoogle\appengine\MemcacheIncrementResponse\IncrementStatusCode
 Cgoogle\appengine\files\ShuffleEnums\InputFormat
 CIterator
 Cstorage_onestore_v3\EntityProto\Kind
 Cgoogle\appengine\api\log\LogService
 Cstorage_onestore_v3\Property\Meaning
 CMemcache
 Cgoogle\appengine\ext\session\MemcacheContainer
 CMemcached
 Cgoogle\appengine\runtime\MemcacheUtils
 Cgoogle\appengine\OutputSettings\MIME_TYPE
 Cgoogle\appengine\datastore\v4\CommitRequest\Mode
 Cgoogle\appengine\TaskQueueMode\Mode
 Cgoogle\appengine\api\modules\ModulesService
 Cgoogle\appengine\datastore\v4\QueryResultBatch\MoreResultsType
 Cgoogle\appengine\files\OpenRequest\OpenMode
 Cgoogle\appengine\datastore\v4\Mutation\Operation
 Cgoogle\appengine_datastore_v3\Query\Filter\Operator
 Cgoogle\appengine\datastore\v4\PropertyFilter\Operator
 Cgoogle\appengine\datastore\v4\CompositeFilter\Operator
 Cgoogle\appengine\InputSettings\ORIENTATION_CORRECTION_TYPE
 Cgoogle\appengine\files\ShuffleEnums\OutputFormat
 CPHPUnit_Framework_TestCase
 Cgoogle\net\ProtocolMessage
 Cgoogle\appengine\api\app_identity\PublicCertificate
 Cgoogle\appengine\api\taskqueue\PushQueue
 Cgoogle\appengine\api\taskqueue\PushTask
 Cgoogle\appengine\datastore\v4\ReadOptions\ReadConsistency
 Cgoogle\appengine\api\log\RequestLog
 Cgoogle\appengine\URLFetchRequest\RequestMethod
 Cgoogle\appengine\TaskQueueAddRequest\RequestMethod
 Cgoogle\appengine\TaskQueueQueryTasksResponse\Task\RequestMethod
 Cgoogle\appengine\datastore\v4\EntityResult\ResultType
 CSessionHandlerInterface
 Cgoogle\appengine\MemcacheSetRequest\SetPolicy
 Cgoogle\appengine\MemcacheSetResponse\SetStatusCode
 Cgoogle\appengine\runtime\SplOverride
 Cstorage_onestore_v3\CompositeIndex\State
 Cgoogle\appengine\files\ShuffleEnums\Status
 Cstorage_onestore_v3\Snapshot\Status
 Cgoogle\appengine\util\StringUtil
 Cgoogle\appengine\ImagesServiceTransform\Type
 CUnexpectedValueException
 Cgoogle\appengine\runtime\UnlinkUploads
 Cgoogle\appengine\api\users\User
 Cgoogle\appengine\api\users\UserService