<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >db2_conn_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="IBM DB2, Cloudscape and Apache Derby Functions" HREF="ref.ibm-db2.html"><LINK REL="PREVIOUS" TITLE="db2_commit" HREF="function.db2-commit.html"><LINK REL="NEXT" TITLE="db2_conn_errormsg" HREF="function.db2-conn-errormsg.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.db2-commit.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.db2-conn-errormsg.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.db2-conn-error" ></A >db2_conn_error</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN80027" ></A ><P > (PECL)</P >db2_conn_error -- Returns a string containing the SQLSTATE returned by the last connection attempt </DIV ><DIV CLASS="refsect1" ><A NAME="AEN80030" ></A ><H2 >说明</H2 >string <B CLASS="methodname" >db2_conn_error</B > ( [resource connection] )<BR ></BR ><P > <B CLASS="function" >db2_conn_error()</B > returns an SQLSTATE value representing the reason the last attempt to connect to a database failed. As <A HREF="function.db2-connect.html" ><B CLASS="function" >db2_connect()</B ></A > returns <TT CLASS="constant" ><B >FALSE</B ></TT > in the event of a failed connection attempt, you do not pass any parameters to <B CLASS="function" >db2_conn_error()</B > to retrieve the SQLSTATE value. </P ><P > If, however, the connection was successful but becomes invalid over time, you can pass the <CODE CLASS="parameter" >connection</CODE > parameter to retrieve the SQLSTATE value for a specific connection. </P ><P > To learn what the SQLSTATE value means, you can issue the following command at a DB2 Command Line Processor prompt: <KBD CLASS="userinput" >db2 '? <CODE CLASS="parameter" >sqlstate-value</CODE >'</KBD >. You can also call <A HREF="function.db2-conn-errormsg.html" ><B CLASS="function" >db2_conn_errormsg()</B ></A > to retrieve an explicit error message and the associated SQLCODE value. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN80049" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >connection</CODE ></DT ><DD ><P > A connection resource associated with a connection that initially succeeded, but which over time became invalid. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN80058" ></A ><H2 >返回值</H2 ><P > Returns the SQLSTATE value resulting from a failed connection attempt. Returns an empty string if there is no error associated with the last connection attempt. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN80061" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN80064" ></A ><P ><B >例 1. Retrieving an SQLSTATE value for a failed connection attempt</B ></P ><P > The following example demonstrates how to return an SQLSTATE value after deliberately passing invalid parameters to <A HREF="function.db2-connect.html" ><B CLASS="function" >db2_connect()</B ></A >. </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$conn </font><font color="#007700">= </font><font color="#0000BB">db2_connect</font><font color="#007700">(</font><font color="#DD0000">'badname'</font><font color="#007700">, </font><font color="#DD0000">'baduser'</font><font color="#007700">, </font><font color="#DD0000">'badpassword'</font><font color="#007700">);<br />if (!</font><font color="#0000BB">$conn</font><font color="#007700">) {<br /> print </font><font color="#DD0000">"SQLSTATE value: " </font><font color="#007700">. </font><font color="#0000BB">db2_conn_error</font><font color="#007700">();<br />}<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P >上例将输出:</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="screen" >SQLSTATE value: 08001</PRE ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN80071" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.db2-conn-errormsg.html" ><B CLASS="function" >db2_conn_errormsg()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.db2-connect.html" ><B CLASS="function" >db2_connect()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.db2-stmt-error.html" ><B CLASS="function" >db2_stmt_error()</B ></A ></TD ></TR ><TR ><TD ><A HREF="function.db2-stmt-errormsg.html" ><B CLASS="function" >db2_stmt_errormsg()</B ></A ></TD ></TR ></TBODY ></TABLE ><P ></P > </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.db2-commit.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.db2-conn-errormsg.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >db2_commit</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.ibm-db2.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >db2_conn_errormsg</TD ></TR ></TABLE ></DIV ></BODY ></HTML >