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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.5 $ -->
<!-- splitted from ./en/functions/sockets.xml, last change in rev 1.27 -->
<refentry id="function.socket-create-listen">
<refnamediv>
<refname>socket_create_listen</refname>
<refpurpose>Opens a socket on port to accept connections </refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>resource</type><methodname>socket_create_listen</methodname>
<methodparam><type>int</type><parameter>port</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>backlog</parameter></methodparam>
</methodsynopsis>
<para>
This function is meant to ease the task of creating a new socket which
only listens to accept new connections.
</para>
<para>
<function>socket_create_listen</function> creates a new socket resource of
type <constant>AF_INET</constant> listening on <emphasis>all</emphasis>
local interfaces on the given port waiting for new connections.
</para>
<para>
The <parameter>backlog</parameter> parameter defines the maximum length
the queue of pending connections may grow to.
<constant>SOMAXCONN</constant> may be passed as
<parameter>backlog</parameter> parameter, see
<function>socket_listen</function> for more information.
</para>
<para>
<function>socket_create_listen</function> returns a new socket resource
on success or &false; on error. The error code can be retrieved with
<function>socket_last_error</function>. This code may be passed to
<function>socket_strerror</function> to get a textual explanation of the
error.
</para>
<note>
<para>
If you want to create a socket which only listens on a certain
interface you need to use <function>socket_create</function>,
<function>socket_bind</function> and <function>socket_listen</function>.
</para>
</note>
<para>
See also
<function>socket_create</function>,
<function>socket_bind</function>,
<function>socket_listen</function>,
<function>socket_last_error</function> and
<function>socket_strerror</function>.
</para>
</refsect1>
</refentry>
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