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Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

Constant Description
STREAM_FILTER_READ * Used with stream_filter_append() and stream_filter_prepend() to indicate that the specified filter should only be applied when reading
STREAM_FILTER_WRITE * Used with stream_filter_append() and stream_filter_prepend() to indicate that the specified filter should only be applied when writing
STREAM_FILTER_ALL * This constant is equivalent to STREAM_FILTER_READ | STREAM_FILTER_WRITE
PSFS_PASS_ON * Return Code indicating that the userspace filter returned buckets in $out .
PSFS_FEED_ME * Return Code indicating that the userspace filter did not return buckets in $out (i.e. No data available).
PSFS_ERR_FATAL * Return Code indicating that the userspace filter encountered an unrecoverable error (i.e. Invalid data received).
STREAM_USE_PATH Flag indicating if the stream used the include path.
STREAM_REPORT_ERRORS Flag indicating if the wrapper is responsible for raising errors using trigger_error() during opening of the stream. If this flag is not set, you should not raise any errors.
STREAM_CLIENT_ASYNC_CONNECT * Open client socket asynchronously. This option must be used together with the STREAM_CLIENT_CONNECT flag. Used with stream_socket_client().
STREAM_CLIENT_CONNECT * Open client socket connection. Client sockets should always include this flag. Used with stream_socket_client().
STREAM_CLIENT_PERSISTENT * Client socket opened with stream_socket_client() should remain persistent between page loads.
STREAM_SERVER_BIND * Tells a stream created with stream_socket_server() to bind to the specified target. Server sockets should always include this flag.
STREAM_SERVER_LISTEN * Tells a stream created with stream_socket_server() and bound using the STREAM_SERVER_BIND flag to start listening on the socket. Connection-orientated transports (such as TCP) must use this flag, otherwise the server socket will not be enabled. Using this flag for connect-less transports (such as UDP) is an error.
STREAM_NOTIFY_RESOLVE * A remote address required for this stream has been resolved, or the resolution failed. See severity for an indication of which happened.
STREAM_NOTIFY_CONNECT A connection with an external resource has been established.
STREAM_NOTIFY_AUTH_REQUIRED Additional authorization is required to access the specified resource. Typical issued with severity level of STREAM_NOTIFY_SEVERITY_ERR.
STREAM_NOTIFY_MIME_TYPE_IS The mime-type of resource has been identified, refer to message for a description of the discovered type.
STREAM_NOTIFY_FILE_SIZE_IS The size of the resource has been discovered.
STREAM_NOTIFY_REDIRECTED The external resource has redirected the stream to an alternate location. Refer to message .
STREAM_NOTIFY_PROGRESS Indicates current progress of the stream transfer in bytes_transferred and possibly bytes_max as well.
STREAM_NOTIFY_COMPLETED * There is no more data available on the stream.
STREAM_NOTIFY_FAILURE A generic error occurred on the stream, consult message and message_code for details.
STREAM_NOTIFY_AUTH_RESULT Authorization has been completed (with or without success).
STREAM_NOTIFY_SEVERITY_INFO Normal, non-error related, notification.
STREAM_NOTIFY_SEVERITY_WARN Non critical error condition. Processing may continue.
STREAM_NOTIFY_SEVERITY_ERR A critical error occurred. Processing cannot continue.
STREAM_IPPROTO_ICMP + Provides a ICMP socket.
STREAM_IPPROTO_IP + Provides a IP socket.
STREAM_IPPROTO_RAW + Provides a RAW socket.
STREAM_IPPROTO_TCP + Provides a TCP socket.
STREAM_IPPROTO_UDP + Provides a UDP socket.
STREAM_PF_INET + Internet Protocol Version 4 (IPv4).
STREAM_PF_INET6 + Internet Protocol Version 6 (IPv6).
STREAM_PF_UNIX + Unix system internal protocols.
STREAM_SOCK_DGRAM + Provides datagrams, which are connectionless messages (UDP, for example).
STREAM_SOCK_RAW + Provides a raw socket, which provides access to internal network protocols and interfaces. Usually this type of socket is just available to the root user.
STREAM_SOCK_RDM + Provides a RDM (Reliably-delivered messages) socket.
STREAM_SOCK_SEQPACKET + Provides a sequenced packet stream socket.
STREAM_SOCK_STREAM + Provides sequenced, two-way byte streams with a transmission mechanism for out-of-band data (TCP, for example).
STREAM_SHUT_RD Used with stream_socket_shutdown() to disable further receptions. Added in PHP 5.2.1.
STREAM_SHUT_WR Used with stream_socket_shutdown() to disable further transmissions. Added in PHP 5.2.1.
STREAM_SHUT_RDWR Used with stream_socket_shutdown() to disable further receptions and transmissions. Added in PHP 5.2.1.

Note: The constants marked with * are just available since PHP 5.0.0.

Note: The constants marked with + are available since PHP 5.1.0 and are meant to be used with stream_socket_pair(). Please note that some of these constants might not be available in your system.



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