<HTML ><HEAD ><TITLE >socket_create_listen</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="PHP Manual" HREF="index.html"><LINK REL="UP" TITLE="Socket functions" HREF="ref.sockets.html"><LINK REL="PREVIOUS" TITLE="socket_connect" HREF="function.socket-connect.html"><LINK REL="NEXT" TITLE="socket_create_pair" HREF="function.socket-create-pair.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.socket-connect.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.socket-create-pair.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.socket-create-listen" ></A >socket_create_listen</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN87211" ></A ><P > (PHP 4 >= 4.1.0)</P >socket_create_listen -- Opens a socket on port to accept connections </DIV ><DIV CLASS="refsect1" ><A NAME="AEN87214" ></A ><H2 >Description</H2 >resource <B CLASS="methodname" >socket_create_listen</B > ( int port [, int backlog])<BR ></BR ><DIV CLASS="warning" ><P ></P ><TABLE CLASS="warning" BORDER="1" WIDTH="100%" ><TR ><TD ALIGN="CENTER" ><B >Warning</B ></TD ></TR ><TR ><TD ALIGN="LEFT" ><P >This function is <SPAN CLASS="emphasis" ><I CLASS="emphasis" >EXPERIMENTAL</I ></SPAN >. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.</P ></TD ></TR ></TABLE ></DIV ><P > This function is meant to ease the task of creating a new socket which only listens to accept new connections. </P ><P > <B CLASS="function" >socket_create_listen()</B > create a new socket resource of type <TT CLASS="constant" ><B >AF_INET</B ></TT > listening on <SPAN CLASS="emphasis" ><I CLASS="emphasis" >all</I ></SPAN > local interfaces on the given port waiting for new connections. </P ><P > The <TT CLASS="parameter" ><I >backlog</I ></TT > parameter defines the maximum length the queue of pending connections may grow to. <TT CLASS="constant" ><B >SOMAXCONN</B ></TT > may be passed as <TT CLASS="parameter" ><I >backlog</I ></TT > parameter, see <A HREF="function.socket-listen.html" ><B CLASS="function" >socket_listen()</B ></A > for more information. </P ><P > <B CLASS="function" >socket_create_listen()</B > returns a new socket resource on success or <TT CLASS="constant" ><B >FALSE</B ></TT > on error. The error code can be retrieved with <A HREF="function.socket-last-error.html" ><B CLASS="function" >socket_last_error()</B ></A >. This code may be passed to <A HREF="function.socket-strerror.html" ><B CLASS="function" >socket_strerror()</B ></A > to get a textual explanation of the error. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Note: </B > If you want to create a socket which only listens on a certain interfaces you need to use <A HREF="function.socket-create.html" ><B CLASS="function" >socket_create()</B ></A >, <A HREF="function.socket-bind.html" ><B CLASS="function" >socket_bind()</B ></A > and <A HREF="function.socket-listen.html" ><B CLASS="function" >socket_listen()</B ></A >. </P ></BLOCKQUOTE ></DIV ><P > See also <A HREF="function.socket-create.html" ><B CLASS="function" >socket_create()</B ></A >, <A HREF="function.socket-bind.html" ><B CLASS="function" >socket_bind()</B ></A >, <A HREF="function.socket-listen.html" ><B CLASS="function" >socket_listen()</B ></A >, <A HREF="function.socket-last-error.html" ><B CLASS="function" >socket_last_error()</B ></A > and <A HREF="function.socket-strerror.html" ><B CLASS="function" >socket_strerror()</B ></A >. </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.socket-connect.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.socket-create-pair.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >socket_connect</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.sockets.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >socket_create_pair</TD ></TR ></TABLE ></DIV ></BODY ></HTML >