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134 lines
5.9 KiB
HTML
134 lines
5.9 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Reads a maximum of length bytes from a socket</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.socket-read" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">socket_read</h1>
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<p class="verinfo">(PHP 4 >= 4.1.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">socket_read</span> — <span class="dc-title">Reads a maximum of length bytes from a socket</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.socket-read-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>socket_read</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$socket</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$length</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$type</code><span class="initializer"> = PHP_BINARY_READ</span></span>
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] ) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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The function <span class="function"><strong>socket_read()</strong></span> reads from the socket
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resource <code class="parameter">socket</code> created by the
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<span class="function"><a href="socket_create.html" class="function">socket_create()</a></span> or
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<span class="function"><a href="socket_accept.html" class="function">socket_accept()</a></span> functions.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.socket-read-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">socket</code></dt>
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<dd>
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<p class="para">
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A valid socket resource created with <span class="function"><a href="socket_create.html" class="function">socket_create()</a></span>
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or <span class="function"><a href="socket_accept.html" class="function">socket_accept()</a></span>.
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</p>
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</dd>
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<dt>
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<code class="parameter">length</code></dt>
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<dd>
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<p class="para">
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The maximum number of bytes read is specified by the
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<code class="parameter">length</code> parameter. Otherwise you can use
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<strong><code>\r</code></strong>, <strong><code>\n</code></strong>,
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or <strong><code>\0</code></strong> to end reading (depending on the <code class="parameter">type</code>
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parameter, see below).
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</p>
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</dd>
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<dt>
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<code class="parameter">type</code></dt>
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<dd>
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<p class="para">
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Optional <code class="parameter">type</code> parameter is a named constant:
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<ul class="itemizedlist">
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<li class="listitem">
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<span class="simpara">
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<strong><code>PHP_BINARY_READ</code></strong> (Default) - use the system
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<em>recv()</em> function. Safe for reading binary data.
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</span>
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</li>
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<li class="listitem">
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<span class="simpara">
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<strong><code>PHP_NORMAL_READ</code></strong> - reading stops at
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<em>\n</em> or <em>\r</em>.
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</span>
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</li>
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</ul>
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.socket-read-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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<span class="function"><strong>socket_read()</strong></span> returns the data as a string on success,
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or <strong><code>FALSE</code></strong> on error (including if the remote host has closed the
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connection). The error code can be retrieved with
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<span class="function"><a href="socket_last_error.html" class="function">socket_last_error()</a></span>. This code may be passed to
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<span class="function"><a href="socket_strerror.html" class="function">socket_strerror()</a></span> to get a textual representation of
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the error.
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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<span class="function"><strong>socket_read()</strong></span> returns a zero length string ("")
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when there is no more data to read.
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</p>
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</p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.socket-read-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="socket_accept.html" class="function" rel="rdfs-seeAlso">socket_accept()</a> - Accepts a connection on a socket</span></li>
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<li class="member"><span class="function"><a href="socket_bind.html" class="function" rel="rdfs-seeAlso">socket_bind()</a> - 给套接字绑定名字</span></li>
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<li class="member"><span class="function"><a href="socket_connect.html" class="function" rel="rdfs-seeAlso">socket_connect()</a> - 开启一个套接字连接</span></li>
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<li class="member"><span class="function"><a href="socket_listen.html" class="function" rel="rdfs-seeAlso">socket_listen()</a> - Listens for a connection on a socket</span></li>
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<li class="member"><span class="function"><a href="socket_last_error.html" class="function" rel="rdfs-seeAlso">socket_last_error()</a> - Returns the last error on the socket</span></li>
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<li class="member"><span class="function"><a href="socket_strerror.html" class="function" rel="rdfs-seeAlso">socket_strerror()</a> - Return a string describing a socket error</span></li>
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<li class="member"><span class="function"><a href="socket_write.html" class="function" rel="rdfs-seeAlso">socket_write()</a> - Write to a socket</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |