php stream_get_meta_data return value_PHP tutorial
The test code is as follows:
$fp=fopen("http://www .sina.com.cn", 'r');
$stream_meta = stream_get_meta_data($fp);
print_r($stream_meta);
?>
在我本机输出如下:
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] =>
)
说明
array stream_get_meta_data ( int $fp )
返回现有 stream 的信息。可以是任何通过 fopen(), fsockopen() 和 pfsockopen() 建立的流。返回的数组包含以下项目:
timed_out (bool) - 如果在上次调用 fread() 或者 fgets() 中等待数据时流超时了则为 TRUE。
blocked (bool) - 如果流处于阻塞 IO 模式时为 TRUE。参见 stream_set_blocking()。
eof (bool) - 如果流到达文件末尾时为 TRUE。注意对于 socket 流甚至当 unread_bytes 为非零值时也可以为 TRUE。要测定是否有更多数据可读,用 feof() 替代读取本项目的值。
unread_bytes (int) - 当前在 PHP 自己的内部缓冲区中的字节数。
Note: 不要在脚本中使用此值。
以下项目是 PHP 4.3 新加的:
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:
本函数是 PHP 4.3 引进的,在此版本之前,可以用 socket_get_status() 来取得前四个项目并且仅能用于基于 socket 的流。
在 PHP 4.3 及以后版本中, socket_get_status() 是本函数的别名。
Note: 本函数不能作用于通过 Socket 扩展库创建的流。
以下项目为 PHP 5.0 新加:
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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