<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >ifx_prepare</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="Informix Functions" HREF="ref.ifx.html"><LINK REL="PREVIOUS" TITLE="ifx_pconnect" HREF="function.ifx-pconnect.html"><LINK REL="NEXT" TITLE="ifx_query" HREF="function.ifx-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.ifx-pconnect.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.ifx-query.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.ifx-prepare" ></A >ifx_prepare</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN100515" ></A ><P > (PHP 3 >= 3.0.4, PHP 4, PHP 5)</P >ifx_prepare -- Prepare an SQL-statement for execution</DIV ><DIV CLASS="refsect1" ><A NAME="AEN100518" ></A ><H2 >说明</H2 >resource <B CLASS="methodname" >ifx_prepare</B > ( string query, resource link_identifier [, int cursor_def, mixed blobidarray] )<BR ></BR ><P > Prepares a <CODE CLASS="parameter" >query</CODE > for later use with <A HREF="function.ifx-do.html" ><B CLASS="function" >ifx_do()</B ></A >. </P ><P > For "select-type" queries a cursor is declared and opened. Non-select queries are "execute immediate". </P ><P > For either query type the number of (estimated or real) affected rows is saved for retrieval by <A HREF="function.ifx-affected-rows.html" ><B CLASS="function" >ifx_affected_rows()</B ></A >. </P ><P > If the contents of the TEXT (or BYTE) column allow it, you can also use <TT CLASS="literal" >ifx_textasvarchar(1)</TT > and <TT CLASS="literal" >ifx_byteasvarchar(1)</TT >. This allows you to treat TEXT (or BYTE) columns just as if they were ordinary (but long) VARCHAR columns for select queries, and you don't need to bother with blob id's. </P ><P > With <TT CLASS="literal" >ifx_textasvarchar(0)</TT > or <TT CLASS="literal" >ifx_byteasvarchar(0)</TT > (the default situation), select queries will return BLOB columns as blob id's (integer value). You can get the value of the blob as a string or file with the blob functions (see below). </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN100547" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >query</CODE ></DT ><DD ><P > The query string. </P ></DD ><DT ><CODE CLASS="parameter" >link_identifier</CODE ></DT ><DD ><P > The link identifier. </P ></DD ><DT ><CODE CLASS="parameter" >cursor_def</CODE ></DT ><DD ><P > This optional parameter allows you to make this a <TT CLASS="literal" >scroll</TT > and/or <TT CLASS="literal" >hold</TT > cursor. It's a bitmask and can be either <TT CLASS="constant" ><B >IFX_SCROLL</B ></TT >, <TT CLASS="constant" ><B >IFX_HOLD</B ></TT >, or both or'ed together. </P ></DD ><DT ><CODE CLASS="parameter" >blobidarray</CODE ></DT ><DD ><P > If you have BLOB (BYTE or TEXT) columns in the query, you can add a <CODE CLASS="parameter" >blobidarray</CODE > parameter containing the corresponding "blob ids", and you should replace those columns with a "?" in the query text. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN100576" ></A ><H2 >返回值</H2 ><P > Returns a valid result identifier for use by <A HREF="function.ifx-do.html" ><B CLASS="function" >ifx_do()</B ></A >, or <TT CLASS="constant" ><B >FALSE</B ></TT > on errors. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN100581" ></A ><H2 >参见</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.ifx-do.html" ><B CLASS="function" >ifx_do()</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.ifx-pconnect.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.ifx-query.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >ifx_pconnect</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.ifx.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >ifx_query</TD ></TR ></TABLE ></DIV ></BODY ></HTML >