<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >mssql_pconnect</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="Microsoft SQL Server Functions" HREF="ref.mssql.html"><LINK REL="PREVIOUS" TITLE="mssql_num_rows" HREF="function.mssql-num-rows.html"><LINK REL="NEXT" TITLE="mssql_query" HREF="function.mssql-query.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.mssql-num-rows.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.mssql-query.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.mssql-pconnect" ></A >mssql_pconnect</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN128975" ></A ><P > (PHP 3, PHP 4, PHP 5)</P >mssql_pconnect -- Open persistent MS SQL connection</DIV ><DIV CLASS="refsect1" ><A NAME="AEN128978" ></A ><H2 >说明</H2 >resource <B CLASS="methodname" >mssql_pconnect</B > ( [string servername [, string username [, string password [, bool new_link]]]] )<BR ></BR ><P > <B CLASS="function" >mssql_pconnect()</B > acts very much like <A HREF="function.mssql-connect.html" ><B CLASS="function" >mssql_connect()</B ></A > with two major differences. </P ><P > First, when connecting, the function would first try to find a (persistent) link that's already open with the same host, username and password. If one is found, an identifier for it will be returned instead of opening a new connection. </P ><P > Second, the connection to the SQL server will not be closed when the execution of the script ends. Instead, the link will remain open for future use (<A HREF="function.mssql-close.html" ><B CLASS="function" >mssql_close()</B ></A > will not close links established by <B CLASS="function" >mssql_pconnect()</B >). </P ><P > This type of links is therefore called 'persistent'. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN129003" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >servername</CODE ></DT ><DD ><P > The MS SQL server. It can also include a port number. e.g. <TT CLASS="literal" >hostname:port</TT >. </P ></DD ><DT ><CODE CLASS="parameter" >username</CODE ></DT ><DD ><P > The username. </P ></DD ><DT ><CODE CLASS="parameter" >password</CODE ></DT ><DD ><P > The password. </P ></DD ><DT ><CODE CLASS="parameter" >new_link</CODE ></DT ><DD ><P > If a second call is made to <B CLASS="function" >mssql_pconnect()</B > with the same arguments, no new link will be established, but instead, the link identifier of the already opened link will be returned. This parameter modifies this behavior and makes <B CLASS="function" >mssql_pconnect()</B > always open a new link, even if <B CLASS="function" >mssql_pconnect()</B > was called before with the same parameters. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN129031" ></A ><H2 >返回值</H2 ><P > Returns a positive MS SQL persistent link identifier on success, or <TT CLASS="constant" ><B >FALSE</B ></TT > on error. </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.mssql-num-rows.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.mssql-query.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >mssql_num_rows</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.mssql.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >mssql_query</TD ></TR ></TABLE ></DIV ></BODY ></HTML >