<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >PDO->getAttribute()</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="PDO Functions" HREF="ref.pdo.html"><LINK REL="PREVIOUS" TITLE="PDO->exec()" HREF="function.pdo-exec.html"><LINK REL="NEXT" TITLE="PDO->getAvailableDrivers()" HREF="function.pdo-getavailabledrivers.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.pdo-exec.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.pdo-getavailabledrivers.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.PDO-getAttribute" ></A >PDO->getAttribute()</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN176619" ></A ><P > (no version information, might be only in CVS)</P >PDO->getAttribute() -- Retrieve a database connection attribute </DIV ><DIV CLASS="refsect1" ><A NAME="AEN176622" ></A ><H2 >说明</H2 >class <B CLASS="classname" >PDO</B > { <BR ></BR >mixed <B CLASS="methodname" >getAttribute</B > ( int attribute )<BR ></BR >}<P > This function returns the value of a database connection attribute. To retrieve PDOStatement attributes, refer to <A HREF="function.pdostatement-getattribute.html" >PDOStatement->getAttribute()</A >. </P ><P > Note that some database/driver combinations may not support all of the database connection attributes. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN176636" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >attribute</CODE ></DT ><DD ><P > One of the <TT CLASS="literal" >PDO::ATTR_*</TT > constants. The constants that apply to database connections are as follows: <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_AUTOCOMMIT</TT ></TD ></TR ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_CASE</TT ></TD ></TR ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_CLIENT_VERSION</TT ></TD ></TR ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_CONNECTION_STATUS</TT ></TD ></TR ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_DRIVER_NAME</TT ></TD ></TR ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_ERRMODE</TT ></TD ></TR ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_ORACLE_NULLS</TT ></TD ></TR ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_PERSISTENT</TT ></TD ></TR ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_PREFETCH</TT ></TD ></TR ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_SERVER_INFO</TT ></TD ></TR ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_SERVER_VERSION</TT ></TD ></TR ><TR ><TD ><TT CLASS="literal" >PDO::ATTR_TIMEOUT</TT ></TD ></TR ></TBODY ></TABLE ><P ></P > </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN176671" ></A ><H2 >返回值</H2 ><P > A successful call returns the value of the requested PDO attribute. An unsuccessful call returns <TT CLASS="literal" >null</TT >. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN176675" ></A ><H2 >范例</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN176678" ></A ><P ><B >例 1. Retrieving database connection attributes</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$conn </font><font color="#007700">= new </font><font color="#0000BB">PDO</font><font color="#007700">(</font><font color="#DD0000">'odbc:sample'</font><font color="#007700">, </font><font color="#DD0000">'db2inst1'</font><font color="#007700">, </font><font color="#DD0000">'ibmdb2'</font><font color="#007700">);<br /></font><font color="#0000BB">$attributes </font><font color="#007700">= array(<br /> </font><font color="#DD0000">"AUTOCOMMIT"</font><font color="#007700">, </font><font color="#DD0000">"ERRMODE"</font><font color="#007700">, </font><font color="#DD0000">"CASE"</font><font color="#007700">, </font><font color="#DD0000">"CLIENT_VERSION"</font><font color="#007700">, </font><font color="#DD0000">"CONNECTION_STATUS"</font><font color="#007700">,<br /> </font><font color="#DD0000">"ORACLE_NULLS"</font><font color="#007700">, </font><font color="#DD0000">"PERSISTENT"</font><font color="#007700">, </font><font color="#DD0000">"PREFETCH"</font><font color="#007700">, </font><font color="#DD0000">"SERVER_INFO"</font><font color="#007700">, </font><font color="#DD0000">"SERVER_VERSION"</font><font color="#007700">,<br /> </font><font color="#DD0000">"TIMEOUT"<br /></font><font color="#007700">);<br /><br />foreach (</font><font color="#0000BB">$attributes </font><font color="#007700">as </font><font color="#0000BB">$val</font><font color="#007700">) {<br /> echo </font><font color="#DD0000">"PDO::ATTR_$val: "</font><font color="#007700">;<br /> echo </font><font color="#0000BB">$conn</font><font color="#007700">-></font><font color="#0000BB">getAttribute</font><font color="#007700">(</font><font color="#0000BB">constant</font><font color="#007700">(</font><font color="#DD0000">"PDO::ATTR_$val"</font><font color="#007700">)) . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />}<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN176681" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.pdo-setattribute.html" >PDO->setAttribute()</A ></TD ></TR ><TR ><TD ><A HREF="function.pdostatement-getattribute.html" >PDOStatement->getAttribute()</A ></TD ></TR ><TR ><TD ><A HREF="function.pdostatement-setattribute.html" >PDOStatement->setAttribute()</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.pdo-exec.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.pdo-getavailabledrivers.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >PDO->exec()</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.pdo.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >PDO->getAvailableDrivers()</TD ></TR ></TABLE ></DIV ></BODY ></HTML >