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<title>Run the sub-connections of the current cURL handle</title>
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<h1 class="refname">curl_multi_exec</h1>
<p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">curl_multi_exec</span> — <span class="dc-title">Run the sub-connections of the current cURL handle</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.curl-multi-exec-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">int</span> <span class="methodname"><strong>curl_multi_exec</strong></span>
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$mh</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter reference">&$still_running</code></span>
)</div>
<p class="para rdfs-comment">
Processes each of the handles in the stack. This method can be called whether or not a handle
needs to read or write data.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.curl-multi-exec-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">mh</code></em>
</span><dd>
<p class="para">A cURL multi handle returned by
<span class="function"><a href="function.curl-multi-init.html" class="function">curl_multi_init()</a></span>.</p></dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">still_running</code></em></span>
<dd>
<p class="para">
A reference to a flag to tell whether the operations are still running.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.curl-multi-exec-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
A cURL code defined in the cURL <a href="curl.constants.html" class="link">Predefined Constants</a>.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
This only returns errors regarding the whole multi stack. There might still have
occurred problems on individual transfers even when this function returns
<strong><code>CURLM_OK</code></strong>.
</p>
</p></blockquote>
</div>
<div class="refsect1 examples" id="refsect1-function.curl-multi-exec-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-4218">
<p><strong>Example #1 <span class="function"><strong>curl_multi_exec()</strong></span> example</strong></p>
<div class="example-contents"><p>
This example will create two cURL handles, add them to a multi
handle, and then run them in parallel.
</p></div>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// create both cURL resources<br /></span><span style="color: #0000BB">$ch1 </span><span style="color: #007700">= </span><span style="color: #0000BB">curl_init</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$ch2 </span><span style="color: #007700">= </span><span style="color: #0000BB">curl_init</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">// set URL and other appropriate options<br /></span><span style="color: #0000BB">curl_setopt</span><span style="color: #007700">(</span><span style="color: #0000BB">$ch1</span><span style="color: #007700">, </span><span style="color: #0000BB">CURLOPT_URL</span><span style="color: #007700">, </span><span style="color: #DD0000">"http://lxr.php.net/"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">curl_setopt</span><span style="color: #007700">(</span><span style="color: #0000BB">$ch1</span><span style="color: #007700">, </span><span style="color: #0000BB">CURLOPT_HEADER</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">curl_setopt</span><span style="color: #007700">(</span><span style="color: #0000BB">$ch2</span><span style="color: #007700">, </span><span style="color: #0000BB">CURLOPT_URL</span><span style="color: #007700">, </span><span style="color: #DD0000">"http://www.php.net/"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">curl_setopt</span><span style="color: #007700">(</span><span style="color: #0000BB">$ch2</span><span style="color: #007700">, </span><span style="color: #0000BB">CURLOPT_HEADER</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">//create the multiple cURL handle<br /></span><span style="color: #0000BB">$mh </span><span style="color: #007700">= </span><span style="color: #0000BB">curl_multi_init</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">//add the two handles<br /></span><span style="color: #0000BB">curl_multi_add_handle</span><span style="color: #007700">(</span><span style="color: #0000BB">$mh</span><span style="color: #007700">,</span><span style="color: #0000BB">$ch1</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">curl_multi_add_handle</span><span style="color: #007700">(</span><span style="color: #0000BB">$mh</span><span style="color: #007700">,</span><span style="color: #0000BB">$ch2</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$active </span><span style="color: #007700">= </span><span style="color: #0000BB">null</span><span style="color: #007700">;<br /></span><span style="color: #FF8000">//execute the handles<br /></span><span style="color: #007700">do {<br /> </span><span style="color: #0000BB">$mrc </span><span style="color: #007700">= </span><span style="color: #0000BB">curl_multi_exec</span><span style="color: #007700">(</span><span style="color: #0000BB">$mh</span><span style="color: #007700">, </span><span style="color: #0000BB">$active</span><span style="color: #007700">);<br />} while (</span><span style="color: #0000BB">$mrc </span><span style="color: #007700">== </span><span style="color: #0000BB">CURLM_CALL_MULTI_PERFORM</span><span style="color: #007700">);<br /><br />while (</span><span style="color: #0000BB">$active </span><span style="color: #007700">&& </span><span style="color: #0000BB">$mrc </span><span style="color: #007700">== </span><span style="color: #0000BB">CURLM_OK</span><span style="color: #007700">) {<br /> if (</span><span style="color: #0000BB">curl_multi_select</span><span style="color: #007700">(</span><span style="color: #0000BB">$mh</span><span style="color: #007700">) != -</span><span style="color: #0000BB">1</span><span style="color: #007700">) {<br /> do {<br /> </span><span style="color: #0000BB">$mrc </span><span style="color: #007700">= </span><span style="color: #0000BB">curl_multi_exec</span><span style="color: #007700">(</span><span style="color: #0000BB">$mh</span><span style="color: #007700">, </span><span style="color: #0000BB">$active</span><span style="color: #007700">);<br /> } while (</span><span style="color: #0000BB">$mrc </span><span style="color: #007700">== </span><span style="color: #0000BB">CURLM_CALL_MULTI_PERFORM</span><span style="color: #007700">);<br /> }<br />}<br /><br /></span><span style="color: #FF8000">//close the handles<br /></span><span style="color: #0000BB">curl_multi_remove_handle</span><span style="color: #007700">(</span><span style="color: #0000BB">$mh</span><span style="color: #007700">, </span><span style="color: #0000BB">$ch1</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">curl_multi_remove_handle</span><span style="color: #007700">(</span><span style="color: #0000BB">$mh</span><span style="color: #007700">, </span><span style="color: #0000BB">$ch2</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">curl_multi_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$mh</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.curl-multi-exec-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.curl-multi-init.html" class="function" rel="rdfs-seeAlso">curl_multi_init()</a> - Returns a new cURL multi handle</span></li>
<li class="member"> <span class="function"><a href="function.curl-multi-select.html" class="function" rel="rdfs-seeAlso">curl_multi_select()</a> - Wait for activity on any curl_multi connection</span></li>
<li class="member"> <span class="function"><a href="function.curl-exec.html" class="function" rel="rdfs-seeAlso">curl_exec()</a> - Perform a cURL session</span></li>
</ul>
</p>
</div>
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