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141 lines
9.6 KiB
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<!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>Sets socket options for the 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-set-option" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">socket_set_option</h1>
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<p class="verinfo">(PHP 4 >= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">socket_set_option</span> — <span class="dc-title">Sets socket options for the socket</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.socket-set-option-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_set_option</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$socket</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$level</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$optname</code></span>
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, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$optval</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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The <span class="function"><strong>socket_set_option()</strong></span> function sets the option
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specified by the <code class="parameter">optname</code> parameter, at the
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specified protocol <code class="parameter">level</code>, to the value pointed to
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by the <code class="parameter">optval</code> parameter for the
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<code class="parameter">socket</code>.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.socket-set-option-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">level</code></dt>
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<dd>
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<p class="para">
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The <code class="parameter">level</code> parameter specifies the protocol
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level at which the option resides. For example, to retrieve options at
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the socket level, a <code class="parameter">level</code> parameter of
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<strong><code>SOL_SOCKET</code></strong> would be used. Other levels, such as
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TCP, can be used by specifying the protocol number of that level.
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Protocol numbers can be found by using the
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<span class="function"><a href="getprotobyname.html" class="function">getprotobyname()</a></span> function.
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</p>
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</dd>
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<dt>
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<code class="parameter">optname</code></dt>
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<dd>
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<p class="para">
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The available socket options are the same as those for the
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<span class="function"><a href="socket_get_option.html" class="function">socket_get_option()</a></span> function.
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</p>
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</dd>
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<dt>
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<code class="parameter">optval</code></dt>
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<dd>
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<p class="para">
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The option value.
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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-set-option-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.socket-set-option-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-5608">
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<p><strong>Example #1 <span class="function"><strong>socket_set_option()</strong></span> example</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$socket </span><span style="color: #007700">= </span><span style="color: #0000BB">socket_create</span><span style="color: #007700">(</span><span style="color: #0000BB">AF_INET</span><span style="color: #007700">, </span><span style="color: #0000BB">SOCK_STREAM</span><span style="color: #007700">, </span><span style="color: #0000BB">SOL_TCP</span><span style="color: #007700">);<br /><br />if (!</span><span style="color: #0000BB">is_resource</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'Unable to create socket: '</span><span style="color: #007700">. </span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">()) . </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />}<br /><br />if (!</span><span style="color: #0000BB">socket_set_option</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">, </span><span style="color: #0000BB">SOL_SOCKET</span><span style="color: #007700">, </span><span style="color: #0000BB">SO_REUSEADDR</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'Unable to set option on socket: '</span><span style="color: #007700">. </span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">()) . </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />}<br /><br />if (!</span><span style="color: #0000BB">socket_bind</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">, </span><span style="color: #DD0000">'127.0.0.1'</span><span style="color: #007700">, </span><span style="color: #0000BB">1223</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'Unable to bind socket: '</span><span style="color: #007700">. </span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">()) . </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">$rval </span><span style="color: #007700">= </span><span style="color: #0000BB">socket_get_option</span><span style="color: #007700">(</span><span style="color: #0000BB">$socket</span><span style="color: #007700">, </span><span style="color: #0000BB">SOL_SOCKET</span><span style="color: #007700">, </span><span style="color: #0000BB">SO_REUSEADDR</span><span style="color: #007700">);<br /><br />if (</span><span style="color: #0000BB">$rval </span><span style="color: #007700">=== </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">'Unable to get socket option: '</span><span style="color: #007700">. </span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">()) . </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />} else if (</span><span style="color: #0000BB">$rval </span><span style="color: #007700">!== </span><span style="color: #0000BB">0</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">'SO_REUSEADDR is set on socket !' </span><span style="color: #007700">. </span><span style="color: #0000BB">PHP_EOL</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.socket-set-option-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_create.html" class="function" rel="rdfs-seeAlso">socket_create()</a> - 创建一个套接字（通讯节点）</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_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_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_get_option.html" class="function" rel="rdfs-seeAlso">socket_get_option()</a> - Gets socket options for the 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> |