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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.3 $ -->
<!-- splitted from ./en/functions/uodbc.xml, last change in rev 1.5 -->
<refentry id="function.odbc-prepare">
<refnamediv>
<refname>odbc_prepare</refname>
<refpurpose>Prepares a statement for execution</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>resource</type><methodname>odbc_prepare</methodname>
<methodparam><type>resource</type><parameter>connection_id</parameter></methodparam>
<methodparam><type>string</type><parameter>query_string</parameter></methodparam>
</methodsynopsis>
<para>
Returns &false; on error.
</para>
<para>
Returns an ODBC result identifier if the SQL command was prepared
successfully. The result identifier can be used later to execute
the statement with <function>odbc_execute</function>.
</para>
<para>
Some databases (such as IBM DB2, MS SQL Server, and Oracle) support
stored procedures that accept parameters of type IN, INOUT, and OUT as
defined by the ODBC specification. However, the Unified ODBC driver
currently only supports parameters of type IN to stored procedures.
</para>
<para>
In the following code, <varname>$res</varname> will only be
valid if all three parameters to myproc are IN parameters:
<programlisting role='php'>
<![CDATA[<?php
$a = 1;
$b = 2;
$c = 3;
$stmt = odbc_prepare($conn, 'CALL myproc(?,?,?)');
$res = odbc_execute($stmt, array($a, $b, $c));
?>
]]>
</programlisting>
If you need to call a stored procedure using INOUT or OUT parameters,
the recommended workaround is to use a native extension for your database
(for example, <link linkend='ref.mssql'>mssql</link> for MS SQL Server,
or <link linkend='ref.mssql'>oci8</link> for Oracle).
</para>
</refsect1>
</refentry>
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