<HTML ><HEAD ><TITLE >socket_strerror</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_shutdown" HREF="function.socket-shutdown.html"><LINK REL="NEXT" TITLE="socket_write" HREF="function.socket-write.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-shutdown.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-write.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.socket-strerror" ></A >socket_strerror</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN88116" ></A ><P > (PHP 4 >= 4.1.0)</P >socket_strerror -- Return a string describing a socket error</DIV ><DIV CLASS="refsect1" ><A NAME="AEN88119" ></A ><H2 >Description</H2 >string <B CLASS="methodname" >socket_strerror</B > ( int errno)<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 > <B CLASS="function" >socket_strerror()</B > takes as its <TT CLASS="parameter" ><I >errno</I ></TT > parameter a socket error code as returned by <A HREF="function.socket-last-error.html" ><B CLASS="function" >socket_last_error()</B ></A > and returns the corresponding explanatory text. This makes it a bit more pleasant to figure out why something didn't work; for instance, instead of having to track down a system include file to find out what '-111' means, you just pass it to <B CLASS="function" >socket_strerror()</B >, and it tells you what happened. </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN88136" ></A ><P ><B >Example 1. <B CLASS="function" >socket_strerror()</B > example</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="php" ><?php if (false == ($socket = @socket_create(AF_INET, SOCK_STREAM, 0))) { echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n"; } if (false == (@socket_bind($socket, '127.0.0.1', 80))) { echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($socket)) . "\n"; } ?></PRE ></TD ></TR ></TABLE ><P > The expected output from the above example (assuming the script is not run with root privileges): <TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >socket_bind() failed: reason: Permission denied</PRE ></TD ></TR ></TABLE > </P ></DIV ></TD ></TR ></TABLE > </P ><P > See also <A HREF="function.socket-accept.html" ><B CLASS="function" >socket_accept()</B ></A >, <A HREF="function.socket-bind.html" ><B CLASS="function" >socket_bind()</B ></A >, <A HREF="function.socket-connect.html" ><B CLASS="function" >socket_connect()</B ></A >, <A HREF="function.socket-listen.html" ><B CLASS="function" >socket_listen()</B ></A >, and <A HREF="function.socket-create.html" ><B CLASS="function" >socket_create()</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-shutdown.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-write.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >socket_shutdown</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_write</TD ></TR ></TABLE ></DIV ></BODY ></HTML >