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194 lines
19 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>Creates a pair of indistinguishable sockets and stores them in an array</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-create-pair" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">socket_create_pair</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_create_pair</span> — <span class="dc-title">Creates a pair of indistinguishable sockets and stores them in an array</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.socket-create-pair-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_create_pair</strong></span>
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( <span class="methodparam"><span class="type">int</span> <code class="parameter">$domain</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$type</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$protocol</code></span>
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, <span class="methodparam"><span class="type">array</span> <code class="parameter reference">&$fd</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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<span class="function"><strong>socket_create_pair()</strong></span> creates two connected and
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indistinguishable sockets, and stores them in <code class="parameter">fd</code>.
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This function is commonly used in IPC (InterProcess Communication).
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.socket-create-pair-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">domain</code></dt>
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<dd>
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<p class="para">
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The <code class="parameter">domain</code> parameter specifies the protocol
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family to be used by the socket. See <span class="function"><a href="socket_create.html" class="function">socket_create()</a></span>
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for the full list.
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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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The <code class="parameter">type</code> parameter selects the type of communication
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to be used by the socket. See <span class="function"><a href="socket_create.html" class="function">socket_create()</a></span> for the
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full list.
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</p>
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</dd>
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<dt>
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<code class="parameter">protocol</code></dt>
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<dd>
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<p class="para">
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The <code class="parameter">protocol</code> parameter sets the specific
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protocol within the specified <code class="parameter">domain</code> to be used
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when communicating on the returned socket. The proper value can be retrieved by
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name by using <span class="function"><a href="getprotobyname.html" class="function">getprotobyname()</a></span>. If
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the desired protocol is TCP, or UDP the corresponding constants
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<strong><code>SOL_TCP</code></strong>, and <strong><code>SOL_UDP</code></strong>
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can also be used.
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</p>
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<p class="para">
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See <span class="function"><a href="socket_create.html" class="function">socket_create()</a></span> for the full list of supported
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protocols.
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</p>
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</dd>
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<dt>
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<code class="parameter">fd</code></dt>
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<dd>
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<p class="para">
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Reference to an array in which the two socket resources will be inserted.
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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-create-pair-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 changelog" id="refsect1-function.socket-create-pair-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>5.3.0</td>
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<td>
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This function is now re-enabled on Windows platforms.
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</td>
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</tr>
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<tr>
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<td>4.3.0</td>
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<td>
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This function was due to a bug made unavailable on
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Windows platforms.
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.socket-create-pair-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="snmp.geterrno.example.basic">
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<p><strong>Example #1 <span class="function"><strong>socket_create_pair()</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 />$sockets </span><span style="color: #007700">= array();<br /><br /></span><span style="color: #FF8000">/* On Windows we need to use AF_INET */<br /></span><span style="color: #0000BB">$domain </span><span style="color: #007700">= (</span><span style="color: #0000BB">strtoupper</span><span style="color: #007700">(</span><span style="color: #0000BB">substr</span><span style="color: #007700">(</span><span style="color: #0000BB">PHP_OS</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">3</span><span style="color: #007700">)) == </span><span style="color: #DD0000">'WIN' </span><span style="color: #007700">? </span><span style="color: #0000BB">AF_INET </span><span style="color: #007700">: </span><span style="color: #0000BB">AF_UNIX</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* Setup socket pair */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">socket_create_pair</span><span style="color: #007700">(</span><span style="color: #0000BB">$domain</span><span style="color: #007700">, </span><span style="color: #0000BB">SOCK_STREAM</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">$sockets</span><span style="color: #007700">) === </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"socket_create_pair failed. Reason: "</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">());<br />}<br /></span><span style="color: #FF8000">/* Send and Recieve Data */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">socket_write</span><span style="color: #007700">(</span><span style="color: #0000BB">$sockets</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">], </span><span style="color: #DD0000">"ABCdef123\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #DD0000">"ABCdef123\n"</span><span style="color: #007700">)) === </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"socket_write() failed. Reason: "</span><span style="color: #007700">.</span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$sockets</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">]));<br />}<br />if ((</span><span style="color: #0000BB">$data </span><span style="color: #007700">= </span><span style="color: #0000BB">socket_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$sockets</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">], </span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #DD0000">"ABCdef123\n"</span><span style="color: #007700">), </span><span style="color: #0000BB">PHP_BINARY_READ</span><span style="color: #007700">)) === </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"socket_read() failed. Reason: "</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">$sockets</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]));<br />}<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* Close sockets */<br /></span><span style="color: #0000BB">socket_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$sockets</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">]);<br /></span><span style="color: #0000BB">socket_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$sockets</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]);<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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<p class="para">
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<div class="example" id="snmp.geterror.example.basic">
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<p><strong>Example #2 <span class="function"><strong>socket_create_pair()</strong></span> IPC 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 />$ary </span><span style="color: #007700">= array();<br /></span><span style="color: #0000BB">$strone </span><span style="color: #007700">= </span><span style="color: #DD0000">'Message From Parent.'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$strtwo </span><span style="color: #007700">= </span><span style="color: #DD0000">'Message From Child.'</span><span style="color: #007700">;<br /><br />if (</span><span style="color: #0000BB">socket_create_pair</span><span style="color: #007700">(</span><span style="color: #0000BB">AF_UNIX</span><span style="color: #007700">, </span><span style="color: #0000BB">SOCK_STREAM</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">, </span><span style="color: #0000BB">$ary</span><span style="color: #007700">) === </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"socket_create_pair() failed. Reason: "</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">());<br />}<br /></span><span style="color: #0000BB">$pid </span><span style="color: #007700">= </span><span style="color: #0000BB">pcntl_fork</span><span style="color: #007700">();<br />if (</span><span style="color: #0000BB">$pid </span><span style="color: #007700">== -</span><span style="color: #0000BB">1</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">'Could not fork Process.'</span><span style="color: #007700">;<br />} elseif (</span><span style="color: #0000BB">$pid</span><span style="color: #007700">) {<br /> </span><span style="color: #FF8000">/*parent*/<br /> </span><span style="color: #0000BB">socket_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">]);<br /> if (</span><span style="color: #0000BB">socket_write</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">], </span><span style="color: #0000BB">$strone</span><span style="color: #007700">, </span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$strone</span><span style="color: #007700">)) === </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"socket_write() failed. Reason: "</span><span style="color: #007700">.</span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]));<br /> }<br /> if (</span><span style="color: #0000BB">socket_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">], </span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$strtwo</span><span style="color: #007700">), </span><span style="color: #0000BB">PHP_BINARY_READ</span><span style="color: #007700">) == </span><span style="color: #0000BB">$strtwo</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"Recieved </span><span style="color: #0000BB">$strtwo</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /> }<br /> </span><span style="color: #0000BB">socket_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]);<br />} else {<br /> </span><span style="color: #FF8000">/*child*/<br /> </span><span style="color: #0000BB">socket_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]);<br /> if (</span><span style="color: #0000BB">socket_write</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">], </span><span style="color: #0000BB">$strtwo</span><span style="color: #007700">, </span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$strtwo</span><span style="color: #007700">)) === </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"socket_write() failed. Reason: "</span><span style="color: #007700">.</span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">]));<br /> }<br /> if (</span><span style="color: #0000BB">socket_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">], </span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$strone</span><span style="color: #007700">), </span><span style="color: #0000BB">PHP_BINARY_READ</span><span style="color: #007700">) == </span><span style="color: #0000BB">$strone</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"Recieved </span><span style="color: #0000BB">$strone</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /> }<br /> </span><span style="color: #0000BB">socket_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">0</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-create-pair-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_create_listen.html" class="function" rel="rdfs-seeAlso">socket_create_listen()</a> - Opens a socket on port to accept connections</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_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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</ul>
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</p>
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</div>
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</div></div></div></body></html> |