Php/docs/stream.constants

来自菜鸟教程
跳转至:导航、​搜索

预定义常量

下列常量由此扩展定义,且仅在此扩展编译入 PHP 或在运行时动态载入时可用。

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).

PSFS_FLAG_NORMAL Regular read/write.
PSFS_FLAG_FLUSH_INC An incremental flush.
PSFS_FLAG_FLUSH_CLOSE Final flush prior to closing.
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.

STREAM_CAST_FOR_SELECT Stream casting, for when stream_select() is

calling stream_cast().

STREAM_CAST_AS_STREAM Stream casting, when stream_cast() is called

otherwise (see above).

STREAM_META_TOUCH Used with stream_metadata(), to specify touch() call.
STREAM_META_OWNER Used with stream_metadata(), to specify chown() call.
STREAM_META_OWNER_NAME Used with stream_metadata(), to specify chown() call.
STREAM_META_GROUP Used with stream_metadata(), to specify chgrp() call.
STREAM_META_GROUP_NAME Used with stream_metadata(), to specify chgrp() call.
STREAM_META_ACCESS Used with stream_metadata(), to specify chmod() call.

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.

Note:

The STREAM_META_* constants are available since PHP 5.4.0 and are meant to be used with stream_metadata().