function.stream-get-meta-data.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Retrieves header/meta data from streams/file pointers</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.stream-get-line.html">stream_get_line</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.stream-get-transports.html">stream_get_transports</a></div> <div class="up"><a href="ref.stream.html">Stream Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.stream-get-meta-data" class="refentry"> <div class="refnamediv"> <h1 class="refname">stream_get_meta_data</h1> <p class="verinfo">(PHP 4 >= 4.3.0, PHP 5)</p><p class="refpurpose"><span class="refname">stream_get_meta_data</span> — <span class="dc-title">Retrieves header/meta data from streams/file pointers</span></p> </div> <div class="refsect1 unknown"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>stream_get_meta_data</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$stream</tt></span> )</div> <p class="simpara"> Returns information about an existing <i><tt class="parameter">stream</tt></i>. The stream can be any stream created by <a href="function.fopen.html" class="function">fopen()</a>, <a href="function.fsockopen.html" class="function">fsockopen()</a> and <a href="function.pfsockopen.html" class="function">pfsockopen()</a>. The result array contains the following items: </p> <ul class="itemizedlist"> <li class="listitem"> <p class="para"> <i><tt class="parameter">timed_out</tt></i> (bool) - <b><tt>TRUE</tt></b> if the stream timed out while waiting for data on the last call to <a href="function.fread.html" class="function">fread()</a> or <a href="function.fgets.html" class="function">fgets()</a>. </p> </li> <li class="listitem"> <p class="para"> <i><tt class="parameter">blocked</tt></i> (bool) - <b><tt>TRUE</tt></b> if the stream is in blocking IO mode. See <a href="function.stream-set-blocking.html" class="function">stream_set_blocking()</a>. </p> </li> <li class="listitem"> <p class="para"> <i><tt class="parameter">eof</tt></i> (bool) - <b><tt>TRUE</tt></b> if the stream has reached end-of-file. Note that for socket streams this member can be <b><tt>TRUE</tt></b> even when <i><tt class="parameter">unread_bytes</tt></i> is non-zero. To determine if there is more data to be read, use <a href="function.feof.html" class="function">feof()</a> instead of reading this item. </p> </li> <li class="listitem"> <p class="para"> <i><tt class="parameter">unread_bytes</tt></i> (int) - the number of bytes currently contained in the PHP's own internal buffer. </p> <blockquote><p><b class="note">Note</b>: <span class="simpara"> You shouldn't use this value in a script. </span> </p></blockquote> </li> </ul> <p class="simpara"> The following items were added in PHP 4.3.0: </p> <ul class="itemizedlist"> <li class="listitem"> <p class="para"> <i><tt class="parameter">stream_type</tt></i> (string) - a label describing the underlying implementation of the stream. </p> </li> <li class="listitem"> <p class="para"> <i><tt class="parameter">wrapper_type</tt></i> (string) - a label describing the protocol wrapper implementation layered over the stream. See <a href="wrappers.html" class="xref">List of Supported Protocols/Wrappers</a> for more information about wrappers. </p> </li> <li class="listitem"> <p class="para"> <i><tt class="parameter">wrapper_data</tt></i> (mixed) - wrapper specific data attached to this stream. See <a href="wrappers.html" class="xref">List of Supported Protocols/Wrappers</a> for more information about wrappers and their wrapper data. </p> </li> <li class="listitem"> <p class="para"> <i><tt class="parameter">filters</tt></i> (array) - and array containing the names of any filters that have been stacked onto this stream. Documentation on filters can be found in the <a href="filters.html" class="link">Filters appendix</a>. </p> </li> </ul> <blockquote><p><b class="note">Note</b>: This function was introduced in PHP 4.3.0, but prior to this version, <a href="function.socket-get-status.html" class="function">socket_get_status()</a> could be used to retrieve the first four items, for <em class="emphasis">socket based streams only</em>. <br /> In PHP 4.3.0 and later, <a href="function.socket-get-status.html" class="function">socket_get_status()</a> is an alias for this function. <br /> </p></blockquote> <blockquote><p><b class="note">Note</b>: <span class="simpara">This function does NOT work on sockets created by the <a href="ref.sockets.html" class="link">Socket extension</a>. </span> </p></blockquote> <p class="simpara"> The following items were added in PHP 5.0.0: </p> <ul class="itemizedlist"> <li class="listitem"> <p class="para"> <i><tt class="parameter">mode</tt></i> (string) - the type of access required for this stream (see Table 1 of the <a href="function.fopen.html" class="link">fopen()</a> reference) </p> </li> <li class="listitem"> <p class="para"> <i><tt class="parameter">seekable</tt></i> (bool) - whether the current stream can be seeked. </p> </li> <li class="listitem"> <p class="para"> <i><tt class="parameter">uri</tt></i> (string) - the URI/filename associated with this stream. </p> </li> </ul> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.stream-get-line.html">stream_get_line</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.stream-get-transports.html">stream_get_transports</a></div> <div class="up"><a href="ref.stream.html">Stream Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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