<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >socket_last_error</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="Socket Functions" HREF="ref.sockets.html"><LINK REL="PREVIOUS" TITLE="socket_getsockname" HREF="function.socket-getsockname.html"><LINK REL="NEXT" TITLE="socket_listen" HREF="function.socket-listen.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></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 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.socket-getsockname.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.socket-listen.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.socket-last-error" ></A >socket_last_error</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN213330" ></A ><P > (PHP 4 >= 4.1.0, PHP 5)</P >socket_last_error -- Returns the last error on the socket </DIV ><DIV CLASS="refsect1" ><A NAME="AEN213333" ></A ><H2 >Description</H2 >int <B CLASS="methodname" >socket_last_error</B > ( [resource socket] )<BR ></BR ><P > This function returns a socket error code. </P ><P > If a socket resource is passed to this function, the last error which occurred on this particular socket is returned. If the socket resource is omitted, the error code of the last failed socket function is returned. The latter is in particular helpful for functions like <A HREF="function.socket-create.html" ><B CLASS="function" >socket_create()</B ></A > which don't return a socket on failure and <A HREF="function.socket-select.html" ><B CLASS="function" >socket_select()</B ></A > which can fail for reasons not directly tied to a particular socket. The error code is suitable to be fed to <A HREF="function.socket-strerror.html" ><B CLASS="function" >socket_strerror()</B ></A > which returns a string describing the given error code. <TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /></font><font color="#007700">if (</font><font color="#0000BB">false </font><font color="#007700">== (</font><font color="#0000BB">$socket </font><font color="#007700">= @</font><font color="#0000BB">socket_create</font><font color="#007700">(</font><font color="#0000BB">AF_INET</font><font color="#007700">, </font><font color="#0000BB">SOCK_STREAM</font><font color="#007700">, </font><font color="#0000BB">SOL_TCP</font><font color="#007700">))) {<br /> die(</font><font color="#DD0000">"Couldn't create socket, error code is: " </font><font color="#007700">. </font><font color="#0000BB">socket_last_error</font><font color="#007700">() .<br /> </font><font color="#DD0000">",error message is: " </font><font color="#007700">. </font><font color="#0000BB">socket_strerror</font><font color="#007700">(</font><font color="#0000BB">socket_last_error</font><font color="#007700">()));<br />}<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >注意: </B > <B CLASS="function" >socket_last_error()</B > does not clear the error code, use <A HREF="function.socket-clear-error.html" ><B CLASS="function" >socket_clear_error()</B ></A > for this purpose. </P ></BLOCKQUOTE ></DIV ></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-getsockname.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.socket-listen.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >socket_getsockname</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.sockets.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >socket_listen</TD ></TR ></TABLE ></DIV ></BODY ></HTML >