php stream_get_meta_data return value

php stream_get_meta_data return value_php basics

the test code is as follows:

the code is as follows:

<?php
$fp=fopen("http://www.sina.com.cn", 'r');
$stream_meta = stream_get_meta_data($fp);
print_r($stream_meta);
?>

the output on my local machine is as follows:

array
(
     [wrapper_data] => array
         (
             [0] => http/1.0 200 ok
             [1] => date: tue, 06 dec 2011 10:08:11 gmt
             [2] => server: apache
             [3] => last-modified: tue, 06 dec 2011 10:07:12 gmt
             [4] => accept-ranges: bytes
             [5] => x-powered-by: mod_xlayout/rc2
             [6] => cache-control: max-age=60
             [7] => expires: tue, 06 dec 2011 10:09:11 gmt
             [8] => vary: accept-encoding
             [9] => x-ua-compatible: ie=emulateie7
             [10] => content-type: text/html
             [11] => age: 26
             [12] => content-length: 675274
             [13] => x-cache: hit from xd33-98.hp08040037.sina.com.cn
             [14] => connection: close
         )
     [wrapper_type] => http
     [stream_type] => tcp_socket/ssl
     [mode] => r
     [unread_bytes] => 3759
     [seekable] =>  
     [uri] => http://www.sina.com.cn
     [timed_out] =>  
     [blocked] => 1
     [eof] =>  
)

description

array stream_get_meta_data (int $fp)
returns the information of the existing stream. can be any stream established via fopen(), fsockopen() and pfsockopen(). the returned array contains the following items:

timed_out (bool) - true if the stream timed out while waiting for data in the last call to fread() or fgets().

blocked (bool) - true if the stream is in blocking io mode. see stream_set_blocking().

eof (bool) - true if the stream reaches the end of the file. note that for socket streams it can be true even when unread_bytes is non-zero. to determine whether more data is available to read, use feof() instead to read the value of this item.

unread_bytes (int) - the number of bytes currently in php's own internal buffer.

note: do not use this value in scripts.

the following items are newly added in php 4.3:

stream_type (string) - 一个描述流底层实现的标注。 
wrapper_type (string) - 一个描述流的分层协议封装实现的标注。更多关于封装协议的信息见 支持的协议和封装协议。 
wrapper_data (mixed) - 当前流附加的封装协议数据。更多封装协议及其数据的信息见 支持的协议和封装协议。 
filters (array) - 包含有被叠加在当前流的任何过滤器名的数组。过滤器的文档见附录中的可用过滤器列表。

note:

this function was introduced in php 4.3. before this version, socket_get_status() could be used to obtain the first four items and could only be used for socket-based streams.

in php 4.3 and later versions, socket_get_status() is an alias of this function.

note: this function cannot be used on streams created through the socket extension library.

the following items are newly added in php 5.0:

mode (string) - 对当前流所要求的访问类型（见 fopen() 中的表格 1）。 
seekable (bool) - 是否可以在当前流中定位。 
uri (string) - 与当前流关联的 URI 或文件名。

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