<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >Constants</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 Driver How-To" HREF="internals.pdo.html"><LINK REL="PREVIOUS" TITLE="pdo_stmt_t definition" HREF="internals.pdo.pdo_stmt_t.html"><LINK REL="NEXT" TITLE="Error handling" HREF="internals.pdo.error-handling.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="sect1" 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="internals.pdo.pdo_stmt_t.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >章 45. PDO Driver How-To</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="internals.pdo.error-handling.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="sect1" ><H1 CLASS="sect1" ><A NAME="internals.pdo.constants" >Constants</A ></H1 ><DIV CLASS="table" ><A NAME="internals.pdo.table.attributes" ></A ><P ><B >表 45-1. Database and Statement Attributes Table</B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL WIDTH="3" TITLE="c1"><COL WIDTH="3" TITLE="c2"><TBODY ><TR ><TD > <P >Attribute</P > </TD ><TD > <P >Valid value(s)</P > </TD ></TR ><TR ><TD > <P >PDO_ATTR_AUTOCOMMIT</P > </TD ><TD > <P >BOOL</P > <P >TRUE if autocommit is set, FALSE otherwise. </P > <P >dbh->auto_commit contains value. Processed by PDO directly.</P > </TD ></TR ><TR ><TD > <P >PDO_ATTR_PREFETCH</P > </TD ><TD > <P >LONG</P > <P >Value of the prefetch size in drivers that support it.</P > </TD ></TR ><TR ><TD > <P >PDO_ATTR_TIMEOUT</P > </TD ><TD > <P >LONG</P > <P >How long to wait for a db operation before timing out.</P > </TD ></TR ><TR ><TD > <P >PDO_ATTR_ERRMODE</P > </TD ><TD > <P >LONG</P > <P >Processed and handled by PDO</P > </TD ></TR ><TR ><TD > <P >PDO_ATTR_SERVER_VERSION</P > </TD ><TD > <P >STRING</P > <P >The <SPAN CLASS="QUOTE" >"human-readable"</SPAN > string representing the Server/Version this driver is currently connected to.</P > </TD ></TR ><TR ><TD > <P >PDO_ATTR_CLIENT_VERSION</P > </TD ><TD > <P >STRING</P > <P >The <SPAN CLASS="QUOTE" >"human-readable"</SPAN > string representing the Client/Version this driver supports.</P > </TD ></TR ><TR ><TD > <P >PDO_ATTR_SERVER_INFO</P > </TD ><TD > <P >STRING</P > <P >The <SPAN CLASS="QUOTE" >"human-readable"</SPAN > description of the Server.</P > </TD ></TR ><TR ><TD > <P >PDO_ATTR_CONNECTION_STATUS</P > </TD ><TD > <P >LONG</P > <P >Values not yet defined</P > </TD ></TR ><TR ><TD > <P >PDO_ATTR_CASE</P > </TD ><TD > <P >LONG</P > <P >Processed and handled by PDO.</P > </TD ></TR ><TR ><TD > <P >PDO_ATTR_CURSOR_NAME</P > </TD ><TD > <P >STRING</P > <P > String representing the name for a database cursor for use in <SPAN CLASS="QUOTE" >"where current in <name>"</SPAN > SQL statements. </P > </TD ></TR ><TR ><TD > <P >PDO_ATTR_CURSOR</P > </TD ><TD > <P >LONG</P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT >PDO_CURSOR_FWDONLY</DT ><DD ><P >Forward only cursor</P ></DD ><DT >PDO_CURSOR_SCROLL</DT ><DD ><P >Scrollable cursor</P ></DD ></DL ></DIV > </TD ></TR ></TBODY ></TABLE ></DIV ><P > The values for the attributes above are all defined in terms of the Zend API. The Zend API contains macros that can be used to convert a *zval to a value. These macros are defined in the Zend header file, zend_API.h in the Zend directory of your PHP build directory. Some of these attributes can be used with the statement attribute handlers such as the PDO_ATTR_CURSOR and PDO_ATTR_CURSOR_NAME. See the statement attribute handling functions for more information. </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="internals.pdo.pdo_stmt_t.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="internals.pdo.error-handling.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >pdo_stmt_t definition</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="internals.pdo.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Error handling</TD ></TR ></TABLE ></DIV ></BODY ></HTML >