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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 296080 $ -->
<refentry xml:id="context.socket" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" role="noversion">
<refnamediv>
<refname>Socket context options</refname>
<refpurpose>Socket context option listing</refpurpose>
</refnamediv>
<refsect1 role="description"><!-- {{{ -->
&reftitle.description;
<para>
Socket context options are available for all wrappers that work over
sockets, like <literal>tcp</literal>, <literal>http</literal> and
<literal>ftp</literal>.
</para>
</refsect1><!-- }}} -->
<refsect1 role="options"><!-- {{{ -->
&reftitle.options;
<para>
<variablelist>
<varlistentry xml:id="context.socket.bindto">
<term><parameter>bindto</parameter></term>
<listitem>
<para>
Used to specify the IP address (either IPv4 or IPv6) and/or the
port number that PHP will use to access the network. The syntax
is <literal>ip:port</literal>.
Setting the IP or the port to <literal>0</literal> will let the system
choose the IP and/or port.
</para>
<note>
<para>
As FTP creates two socket connections during normal operation,
the port number cannot be specified using this option.
</para>
</note>
</listitem>
</varlistentry>
<varlistentry xml:id="context.socket.backlog">
<term><parameter>backlog</parameter></term>
<listitem>
<para>
Used to limit the number of outstanding connections in the
socket's listen queue.
</para>
<note>
<para>
This is only applicable to <function>stream_socket_server</function>.
</para>
</note>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1><!-- }}} -->
<refsect1 role="changelog"><!-- {{{ -->
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>5.1.0</entry>
<entry>
Added <literal>bindto</literal>.
</entry>
</row>
<row>
<entry>5.3.3</entry>
<entry>
Added <literal>backlog</literal>.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1><!-- }}} -->
<refsect1 role="examples"><!-- {{{ -->
&reftitle.examples;
<para>
<example xml:id="context.socket.example-bindto"><!-- {{{ -->
<title>Basic <parameter>bindto</parameter> usage example</title>
<programlisting role="php">
<![CDATA[
<?php
// connect to the internet using the '192.168.0.100' IP
$opts = array(
'socket' => array(
'bindto' => '192.168.0.100:0',
),
);
// connect to the internet using the '192.168.0.100' IP and port '7000'
$opts = array(
'socket' => array(
'bindto' => '192.168.0.100:7000',
),
);
// connect to the internet using port '7000'
$opts = array(
'socket' => array(
'bindto' => '0:7000',
),
);
// create the context...
$context = stream_context_create($opts);
// ...and use it to fetch the data
echo file_get_contents('http://www.example.com', false, $context);
?>
]]>
</programlisting>
</example><!-- }}} -->
</para>
</refsect1><!-- }}} -->
</refentry>
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