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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xml:id="function.curl-multi-exec" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>curl_multi_exec</refname>
<refpurpose>Run the sub-connections of the current cURL handle</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>int</type><methodname>curl_multi_exec</methodname>
<methodparam><type>resource</type><parameter>mh</parameter></methodparam>
<methodparam><type>int</type><parameter role="reference">still_running</parameter></methodparam>
</methodsynopsis>
<para>
Processes each of the handles in the stack. This method can be called whether or not a handle
needs to read or write data.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
&curl.mh.description;
<varlistentry>
<term><parameter>still_running</parameter></term>
<listitem>
<para>
A reference to a flag to tell whether the operations are still running.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
A cURL code defined in the cURL <link linkend="curl.constants">Predefined Constants</link>.
</para>
<note>
<para>
This only returns errors regarding the whole multi stack. There might still have
occurred problems on individual transfers even when this function returns
<constant>CURLM_OK</constant>.
</para>
</note>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>curl_multi_exec</function> example</title>
<para>
This example will create two cURL handles, add them to a multi
handle, and then run them in parallel.
</para>
<programlisting role="php">
<![CDATA[
<?php
// create both cURL resources
$ch1 = curl_init();
$ch2 = curl_init();
// set URL and other appropriate options
curl_setopt($ch1, CURLOPT_URL, "http://lxr.php.net/");
curl_setopt($ch1, CURLOPT_HEADER, 0);
curl_setopt($ch2, CURLOPT_URL, "http://www.php.net/");
curl_setopt($ch2, CURLOPT_HEADER, 0);
//create the multiple cURL handle
$mh = curl_multi_init();
//add the two handles
curl_multi_add_handle($mh,$ch1);
curl_multi_add_handle($mh,$ch2);
$active = null;
//execute the handles
do {
$mrc = curl_multi_exec($mh, $active);
} while ($mrc == CURLM_CALL_MULTI_PERFORM);
while ($active && $mrc == CURLM_OK) {
if (curl_multi_select($mh) != -1) {
do {
$mrc = curl_multi_exec($mh, $active);
} while ($mrc == CURLM_CALL_MULTI_PERFORM);
}
}
//close the handles
curl_multi_remove_handle($mh, $ch1);
curl_multi_remove_handle($mh, $ch2);
curl_multi_close($mh);
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>curl_multi_init</function></member>
<member><function>curl_exec</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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