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  <refentry id="function.imap-open">
   <refnamediv>
    <refname>imap_open</refname>
    <refpurpose>Open an IMAP stream to a mailbox</refpurpose>
   </refnamediv>
   <refsect1>
    <title>Description</title>
     <methodsynopsis>
      <type>resource</type><methodname>imap_open</methodname>
      <methodparam><type>string</type><parameter>mailbox</parameter></methodparam>
      <methodparam><type>string</type><parameter>username</parameter></methodparam>
      <methodparam><type>string</type><parameter>password</parameter></methodparam>
      <methodparam choice="opt"><type>int</type><parameter>options</parameter></methodparam>
     </methodsynopsis>
    <para>
     Returns an IMAP stream on success and &false; on error.  This
     function can also be used to open streams to POP3 and NNTP
     servers, but some functions and features are only available
     on IMAP servers.  
    </para>
    <para>
     A mailbox name consists of a server part and a mailbox path on
     this server. The special name INBOX stands for the current users
     personal mailbox. The server part, which is enclosed in '{' and
     '}', consists of the servers name or ip address, an optional port
     (prefixed by ':'), and an optional protocol specification (prefixed
     by '/'). The server part is mandatory in all mailbox
     parameters. Mailbox names that contain international characters
     besides those in the printable ASCII space have to be encoded 
     with <function>imap_utf7_encode</function>.
    </para>
    <para>
     The options are a bit mask with one or more of the following:
     <itemizedlist>
      <listitem>
       <simpara>
        OP_READONLY - Open mailbox read-only
       </simpara>
      </listitem>
      <listitem>
       <simpara>
        OP_ANONYMOUS - Dont use or update a
        <filename>.newsrc</filename> for news (NNTP only)
       </simpara>
      </listitem>
      <listitem>
       <simpara>
        OP_HALFOPEN - For IMAP and NNTP names, open a connection but
        dont open a mailbox
       </simpara>
      </listitem> 
      <listitem>
       <simpara>
        CL_EXPUNGE - Expunge mailbox automatically upon mailbox close
       </simpara>
      </listitem>
     </itemizedlist>
    </para>
    <para>
     To connect to an IMAP server running on port 143 on the
     local machine, do the following:
     <informalexample>
      <programlisting role="php"> 
<![CDATA[
$mbox = imap_open ("{localhost:143}INBOX", "user_id", "password");
]]>
      </programlisting>
     </informalexample>
     To connect to a POP3 server on port 110 on the local server, use:
     <informalexample>
      <programlisting role="php">
<![CDATA[
$mbox = imap_open ("{localhost:110/pop3}INBOX", "user_id", "password");
]]>
      </programlisting>
     </informalexample>
     To connect to an SSL IMAP or POP3 server, add /ssl after the protocol
     specification:
     <informalexample>
      <programlisting role="php">
<![CDATA[
$mbox = imap_open ("{localhost:993/imap/ssl}INBOX", "user_id", "password");
]]>
      </programlisting>
     </informalexample>
     To connect to an SSL IMAP or POP3 server with a self-signed
     certificate, add /ssl/novalidate-cert after the protocol specification:
     <informalexample>
      <programlisting role="php">
<![CDATA[
$mbox = imap_open ("{localhost:995/pop3/ssl/novalidate-cert}", "user_id", "password");
]]>
      </programlisting>
     </informalexample>
     To connect to an NNTP server on port 119 on the local server, use:
     <informalexample>
      <programlisting role="php">
<![CDATA[
$nntp = imap_open ("{localhost:119/nntp}comp.test", "", "");
]]>
      </programlisting>
     </informalexample>
     To connect to a remote server replace "localhost" with the name
     or the IP address of the server you want to connect to.
    </para>
    <para>
     <example>
      <title><function>imap_open</function> example</title>
      <programlisting role="php">
<![CDATA[
$mbox = imap_open ("{your.imap.host:143}", "username", "password");

echo "<p><h1>Mailboxes</h1>\n";
$folders = imap_listmailbox ($mbox, "{your.imap.host:143}", "*");

if ($folders == false) {
    echo "Call failed<br>\n";
} else {
    while (list ($key, $val) = each ($folders)) {
        echo $val."<br>\n";
    }
}

echo "<p><h1>Headers in INBOX</h1>\n";
$headers = imap_headers ($mbox);

if ($headers == false) {
    echo "Call failed<br>\n";
} else {
    while (list ($key,$val) = each ($headers)) {
        echo $val."<br>\n";
    }
}

imap_close($mbox);
]]>
      </programlisting>
     </example>
    </para>
   </refsect1>
  </refentry>

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