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<refentry xml:id="function.curl-init" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>curl_init</refname>
  <refpurpose>Initialize a cURL session</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type class="union"><type>CurlHandle</type><type>false</type></type><methodname>curl_init</methodname>
   <methodparam choice="opt"><type class="union"><type>string</type><type>null</type></type><parameter>url</parameter><initializer>&null;</initializer></methodparam>
  </methodsynopsis>
  <para>
   Initializes a new session and return a cURL handle for use with the
   <function>curl_setopt</function>, <function>curl_exec</function>,
   and <function>curl_close</function> functions.  
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>url</parameter></term>
     <listitem>
      <para>
       If provided, the <constant>CURLOPT_URL</constant> option will be set
       to its value. You can manually set this using the 
       <function>curl_setopt</function> function.
      </para>
      <note>
       <para>
        The <literal>file</literal> protocol is disabled by cURL if
        <link linkend="ini.open-basedir">open_basedir</link> is set.
       </para>
      </note>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns a cURL handle on success, &false; on errors.
  </para>
 </refsect1>
 
 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry>8.0.0</entry>
      <entry>
       On success, this function returns a <classname>CurlHandle</classname> instance now;
       previously, a <type>resource</type> was returned.
      </entry>
     </row>
     <row>
      <entry>8.0.0</entry>
      <entry>
       <parameter>url</parameter> is nullable now.
      </entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>
     Initializing a new cURL session and fetching a web page
    </title>
    <programlisting role="php">
<![CDATA[
<?php
// create a new cURL resource
$ch = curl_init();

// set URL and other appropriate options
curl_setopt($ch, CURLOPT_URL, "http://www.example.com/");
curl_setopt($ch, CURLOPT_HEADER, 0);

// grab URL and pass it to the browser
curl_exec($ch);

// close cURL resource, and free up system resources
curl_close($ch);
?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>curl_close</function></member>
    <member><function>curl_multi_init</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
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