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<title>Adds a request to the request group.</title>
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<div class="refnamediv">
<h1 class="refname">eio_grp_add</h1>
<p class="verinfo">(PECL eio >= 0.0.1dev)</p><p class="refpurpose"><span class="refname">eio_grp_add</span> — <span class="dc-title">Adds a request to the request group.</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.eio-grp-add-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type"><span class="type void">void</span></span> <span class="methodname"><strong>eio_grp_add</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$grp</code></span>
, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$req</code></span>
)</div>
<p class="para rdfs-comment">
<span class="function"><strong>eio_grp_add()</strong></span> adds a request to the request group.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.eio-grp-add-parameters">
<h3 class="title">Parameters</h3>
<dl>
<dt>
<span class="term"><em><code class="parameter">grp</code></em></span>
<dd>
<p class="para">
The request group resource returned by <span class="function"><a href="function.eio-grp.html" class="function">eio_grp()</a></span>
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">req</code></em></span>
<dd>
<p class="para">
The request resource
</p>
</dd>
</dt>
</dl>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.eio-grp-add-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
<span class="function"><strong>eio_grp_add()</strong></span> doesn't return a value.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.eio-grp-add-examples">
<h3 class="title">Examples</h3>
<div class="example" id="example-3592">
<p><strong>Example #1 Grouping requests</strong></p>
<div class="example-contents"><div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">/*<br /> * Create a group request to open, read and close a file<br /> */<br /><br />// Create temporary file and write some bytes to it<br /></span><span style="color: #0000BB">$temp_filename </span><span style="color: #007700">= </span><span style="color: #0000BB">dirname</span><span style="color: #007700">(</span><span style="color: #0000BB">__FILE__</span><span style="color: #007700">) .</span><span style="color: #DD0000">"/eio-file.tmp"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$fp </span><span style="color: #007700">= </span><span style="color: #0000BB">fopen</span><span style="color: #007700">(</span><span style="color: #0000BB">$temp_filename</span><span style="color: #007700">, </span><span style="color: #DD0000">"w"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fwrite</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">, </span><span style="color: #DD0000">"some data"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">fclose</span><span style="color: #007700">(</span><span style="color: #0000BB">$fp</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* Is called when the group requests are done */<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">my_grp_done</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">, </span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$result </span><span style="color: #007700">== </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /> @</span><span style="color: #0000BB">unlink</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #FF8000">/* Is called when eio_open() done */<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">my_grp_file_opened_callback</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">, </span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> global </span><span style="color: #0000BB">$grp</span><span style="color: #007700">;<br /><br /> </span><span style="color: #FF8000">// $result should contain the file descriptor<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$result </span><span style="color: #007700">> </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /><br /> </span><span style="color: #FF8000">// Create eio_read() request and add it to the group<br /> // Pass file descriptor to the callback<br /> </span><span style="color: #0000BB">$req </span><span style="color: #007700">= </span><span style="color: #0000BB">eio_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">, </span><span style="color: #0000BB">4</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">,<br /> </span><span style="color: #0000BB">EIO_PRI_DEFAULT</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_grp_file_read_callback"</span><span style="color: #007700">, </span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">eio_grp_add</span><span style="color: #007700">(</span><span style="color: #0000BB">$grp</span><span style="color: #007700">, </span><span style="color: #0000BB">$req</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #FF8000">/* Is called when eio_read() done */<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">my_grp_file_read_callback</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">, </span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> global </span><span style="color: #0000BB">$grp</span><span style="color: #007700">;<br /><br /> </span><span style="color: #FF8000">// Read bytes<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /><br /> </span><span style="color: #FF8000">// Create eio_close() request and add it to the group<br /> // $data should contain the file descriptor<br /> </span><span style="color: #0000BB">$req </span><span style="color: #007700">= </span><span style="color: #0000BB">eio_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$data</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">eio_grp_add</span><span style="color: #007700">(</span><span style="color: #0000BB">$grp</span><span style="color: #007700">, </span><span style="color: #0000BB">$req</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #FF8000">// Create request group<br /></span><span style="color: #0000BB">$grp </span><span style="color: #007700">= </span><span style="color: #0000BB">eio_grp</span><span style="color: #007700">(</span><span style="color: #DD0000">"my_grp_done"</span><span style="color: #007700">, </span><span style="color: #0000BB">$temp_filename</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$grp</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Create eio_open() request and add it to the group<br /></span><span style="color: #0000BB">$req </span><span style="color: #007700">= </span><span style="color: #0000BB">eio_open</span><span style="color: #007700">(</span><span style="color: #0000BB">$temp_filename</span><span style="color: #007700">, </span><span style="color: #0000BB">EIO_O_RDWR </span><span style="color: #007700">| </span><span style="color: #0000BB">EIO_O_APPEND </span><span style="color: #007700">, </span><span style="color: #0000BB">NULL</span><span style="color: #007700">,<br /> </span><span style="color: #0000BB">EIO_PRI_DEFAULT</span><span style="color: #007700">, </span><span style="color: #DD0000">"my_grp_file_opened_callback"</span><span style="color: #007700">, </span><span style="color: #0000BB">NULL</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">eio_grp_add</span><span style="color: #007700">(</span><span style="color: #0000BB">$grp</span><span style="color: #007700">, </span><span style="color: #0000BB">$req</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Process requests<br /></span><span style="color: #0000BB">eio_event_loop</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div></div>
<div class="example-contents"><p>The above example will output
something similar to:</p></div>
<div class="example-contents screen"><div class="cdata"><pre>
resource(6) of type (EIO Group Descriptor)
bool(true)
string(4) "some"
bool(true)
</pre></div></div>
</div>
</div>
<div class="refsect1 seealso" id="refsect1-function.eio-grp-add-seealso">
<h3 class="title">See Also</h3>
<ul class="simplelist">
<li class="member">eio_grp</li>
<li class="member">eio_grp_cancel</li>
<li class="member">eio_grp_limit</li>
</ul>
</div>
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