function.socket-create-pair.html

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       the desired protocol is TCP, or UDP the corresponding constants
       <b><tt>SOL_TCP</tt></b>, and <b><tt>SOL_UDP</tt></b>
       can also be used.
      </p>
      <p class="para">
       See <a href="function.socket-create.html" class="function">socket_create()</a> for the full list of supported 
       protocols.
      </p>
     </dd>

    </dt>

    <dt>

     <span class="term"><i><tt class="parameter">fd</tt></i>
</span>

     <dd>

      <p class="para">
       Reference to an array in which the two socket resources will be inserted.
      </p>
     </dd>

    </dt>

   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues">
  <h3 class="title">Return Values</h3>
  <p class="para">
   Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure.
  </p>
 </div>


 <div class="refsect1 examples">
  <h3 class="title">Examples</h3>
  <p class="para">
   <div class="example">
    <p><b>Example #1 <b>socket_create_pair()</b> example</b></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$sockets&nbsp;</span><span style="color: #007700">=&nbsp;array();<br /></span><span style="color: #FF8000">/*&nbsp;Setup&nbsp;socket&nbsp;pair&nbsp;*/<br /></span><span style="color: #007700">if&nbsp;(</span><span style="color: #0000BB">socket_create_pair</span><span style="color: #007700">(</span><span style="color: #0000BB">AF_UNIX</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">SOCK_STREAM</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$sockets</span><span style="color: #007700">)&nbsp;===&nbsp;</span><span style="color: #0000BB">false</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"socket_create_pair&nbsp;failed.&nbsp;Reason:&nbsp;"</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">/*&nbsp;Send&nbsp;and&nbsp;Recieve&nbsp;Data&nbsp;*/<br /></span><span style="color: #007700">if&nbsp;(</span><span style="color: #0000BB">socket_write</span><span style="color: #007700">(</span><span style="color: #0000BB">$sockets</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">],&nbsp;</span><span style="color: #DD0000">"ABCdef123\n"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #DD0000">"ABCdef123\n"</span><span style="color: #007700">))&nbsp;===&nbsp;</span><span style="color: #0000BB">false</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"socket_write()&nbsp;failed.&nbsp;Reason:&nbsp;"</span><span style="color: #007700">.</span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$sockets</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">]));<br />}<br />if&nbsp;((</span><span style="color: #0000BB">$data&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">socket_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$sockets</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">],&nbsp;</span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #DD0000">"ABCdef123\n"</span><span style="color: #007700">),&nbsp;</span><span style="color: #0000BB">PHP_BINARY_READ</span><span style="color: #007700">)&nbsp;===&nbsp;</span><span style="color: #0000BB">false</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"socket_read()&nbsp;failed.&nbsp;Reason:&nbsp;"</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">/*&nbsp;Close&nbsp;sockets&nbsp;*/<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">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
  <p class="para">
   <div class="example">
    <p><b>Example #2 <b>socket_create_pair()</b> IPC example</b></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$ary&nbsp;</span><span style="color: #007700">=&nbsp;array();<br /></span><span style="color: #0000BB">$strone&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">'Message&nbsp;From&nbsp;Parent.'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$strtwo&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #DD0000">'Message&nbsp;From&nbsp;Child.'</span><span style="color: #007700">;<br />if&nbsp;(</span><span style="color: #0000BB">socket_create_pair</span><span style="color: #007700">(</span><span style="color: #0000BB">AF_UNIX</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">SOCK_STREAM</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">0</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$ary</span><span style="color: #007700">)&nbsp;===&nbsp;</span><span style="color: #0000BB">false</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"socket_create_pair()&nbsp;failed.&nbsp;Reason:&nbsp;"</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">$pid&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">pcntl_fork</span><span style="color: #007700">();<br />if&nbsp;(</span><span style="color: #0000BB">$pid&nbsp;</span><span style="color: #007700">==&nbsp;-</span><span style="color: #0000BB">1</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">'Could&nbsp;not&nbsp;fork&nbsp;Process.'</span><span style="color: #007700">;<br />}&nbsp;elseif&nbsp;(</span><span style="color: #0000BB">$pid</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">/*parent*/<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">socket_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">]);<br />&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(</span><span style="color: #0000BB">socket_write</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">],&nbsp;</span><span style="color: #0000BB">$strone</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$strone</span><span style="color: #007700">))&nbsp;===&nbsp;</span><span style="color: #0000BB">false</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"socket_write()&nbsp;failed.&nbsp;Reason:&nbsp;"</span><span style="color: #007700">.</span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]));<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(</span><span style="color: #0000BB">socket_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">],&nbsp;</span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$strtwo</span><span style="color: #007700">),&nbsp;</span><span style="color: #0000BB">PHP_BINARY_READ</span><span style="color: #007700">)&nbsp;==&nbsp;</span><span style="color: #0000BB">$strtwo</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"Recieved&nbsp;$strtwo\n"</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">socket_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]);<br />}&nbsp;else&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #FF8000">/*child*/<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">socket_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]);<br />&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(</span><span style="color: #0000BB">socket_write</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">],&nbsp;</span><span style="color: #0000BB">$strtwo</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$strtwo</span><span style="color: #007700">))&nbsp;===&nbsp;</span><span style="color: #0000BB">false</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"socket_write()&nbsp;failed.&nbsp;Reason:&nbsp;"</span><span style="color: #007700">.</span><span style="color: #0000BB">socket_strerror</span><span style="color: #007700">(</span><span style="color: #0000BB">socket_last_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">]));<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;if&nbsp;(</span><span style="color: #0000BB">socket_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$ary</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">],&nbsp;</span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$strone</span><span style="color: #007700">),&nbsp;</span><span style="color: #0000BB">PHP_BINARY_READ</span><span style="color: #007700">)&nbsp;==&nbsp;</span><span style="color: #0000BB">$strone</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #DD0000">"Recieved&nbsp;$strone\n"</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;</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">?&gt;</span>
</span>
</code></div>
    </div>

   </div>
  </p>
 </div>


 <div class="refsect1 seealso">
  <h3 class="title">See Also</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><a href="function.socket-create.html" class="function" rel="rdfs-seeAlso">socket_create()</a></li>
    <li class="member"><a href="function.socket-create-listen.html" class="function" rel="rdfs-seeAlso">socket_create_listen()</a></li>
    <li class="member"><a href="function.socket-bind.html" class="function" rel="rdfs-seeAlso">socket_bind()</a></li>
    <li class="member"><a href="function.socket-listen.html" class="function" rel="rdfs-seeAlso">socket_listen()</a></li>
    <li class="member"><a href="function.socket-last-error.html" class="function" rel="rdfs-seeAlso">socket_last_error()</a></li>
    <li class="member"><a href="function.socket-strerror.html" class="function" rel="rdfs-seeAlso">socket_strerror()</a></li>
   </ul>
  </p>
 </div>

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