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php-manual-zh-5.2.4-1mdv2008.1.noarch.rpm

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><H1
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>PDO-&#62;getAttribute()</H1
><DIV
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><A
NAME="AEN176619"
></A
><P
>    (no version information, might be only in CVS)</P
>PDO-&#62;getAttribute()&nbsp;--&nbsp;
   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
>&#13;   This function returns the value of a database connection attribute. To
   retrieve PDOStatement attributes, refer to
   <A
HREF="function.pdostatement-getattribute.html"
>PDOStatement-&#62;getAttribute()</A
>.
  </P
><P
>&#13;   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
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>attribute</CODE
></DT
><DD
><P
>&#13;       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
>&#13;   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
>&#13;   <TABLE
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><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN176678"
></A
><P
><B
>例 1. Retrieving database connection attributes</B
></P
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?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 />&nbsp;&nbsp;&nbsp;&nbsp;</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 />&nbsp;&nbsp;&nbsp;&nbsp;</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 />&nbsp;&nbsp;&nbsp;&nbsp;</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 />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"PDO::ATTR_$val: "</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#0000BB">$conn</font><font color="#007700">-&gt;</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">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
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>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN176681"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
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><A
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>PDO-&#62;setAttribute()</A
></TD
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><A
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>PDOStatement-&#62;getAttribute()</A
></TD
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><A
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>PDOStatement-&#62;setAttribute()</A
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