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

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><H1
><A
NAME="function.mysqli-stmt-prepare"
></A
>mysqli_stmt_prepare</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN142615"
></A
><P
>    (PHP 5)</P
>mysqli_stmt_prepare<P
>    (no version information, might be only in CVS)</P
>stmt-&#62;prepare()&nbsp;--&nbsp;Prepare a SQL statement for execution</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN142619"
></A
><H2
>说明</H2
><P
>Procedure style:</P
>bool <B
CLASS="methodname"
>mysqli_stmt_prepare</B
> ( mysqli_stmt stmt, string query )<BR
></BR
><P
>Object oriented style (method)</P
>class <B
CLASS="classname"
>mysqli_stmt</B
> { <BR
></BR
>mixed <B
CLASS="methodname"
>prepare</B
> ( string query )<BR
></BR
>}<P
>&#13;   Prepares the SQL query pointed to by the null-terminated string query. 
  </P
><P
>&#13;   The parameter markers must be bound to application variables using
   <A
HREF="function.mysqli-stmt-bind-param.html"
><B
CLASS="function"
>mysqli_stmt_bind_param()</B
></A
> and/or 
   <A
HREF="function.mysqli-stmt-bind-result.html"
><B
CLASS="function"
>mysqli_stmt_bind_result()</B
></A
> before executing the
   statement or fetching rows.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN142645"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>&#13;stmt</CODE
></DT
><DD
><P
>Procedural style only: A statement identifier
returned by <A
HREF="function.mysqli-stmt-init.html"
><B
CLASS="function"
>mysqli_stmt_init()</B
></A
>.</P
></DD
><DT
><CODE
CLASS="parameter"
>query</CODE
></DT
><DD
><P
>&#13;       The query, as a string. It must consist of a single SQL statement.
      </P
><P
>&#13;       You can include one or more parameter markers in the SQL statement by
       embedding question mark (<TT
CLASS="literal"
>?</TT
>) characters at the
       appropriate positions.
      </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
        You should not add a terminating semicolon or <TT
CLASS="literal"
>\g</TT
>
        to the statement.
       </P
></BLOCKQUOTE
></DIV
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
        The markers are legal only in certain places in SQL statements.
        For example, they are allowed in the VALUES() list of an INSERT statement
        (to specify column values for a row), or in a comparison with a column in
        a WHERE clause to specify a comparison value.
       </P
><P
>&#13;        However, they are not allowed for identifiers (such as table or column names),
        in the select list that names the columns to be returned by a SELECT statement),
        or to specify both operands of a binary operator such as the <TT
CLASS="literal"
>=</TT
>
        equal sign. The latter restriction is necessary because it would be impossible
        to determine the parameter type. In general, parameters are legal only in Data
        Manipulation Languange (DML) statements, and not in Data Defination Language
        (DDL) statements.
       </P
></BLOCKQUOTE
></DIV
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN142669"
></A
><H2
>返回值</H2
><P
>&#13;   如果成功则返回 <TT
CLASS="constant"
><B
>TRUE</B
></TT
>，失败则返回 <TT
CLASS="constant"
><B
>FALSE</B
></TT
>。
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN142674"
></A
><H2
>范例</H2
><TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN142676"
></A
><P
><B
>例 1. Object oriented style</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$mysqli </font><font color="#007700">= new </font><font color="#0000BB">mysqli</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">mysqli_connect_errno</font><font color="#007700">()) {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_connect_error</font><font color="#007700">());<br />&nbsp;&nbsp;&nbsp;&nbsp;exit();<br />}<br /><br /></font><font color="#0000BB">$city </font><font color="#007700">= </font><font color="#DD0000">"Amersfoort"</font><font color="#007700">;<br /><br /></font><font color="#FF8000">/* create a prepared statement */<br /></font><font color="#0000BB">$stmt </font><font color="#007700">=&nbsp;&nbsp;</font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">stmt_init</font><font color="#007700">();<br />if (</font><font color="#0000BB">$stmt</font><font color="#007700">-&gt;</font><font color="#0000BB">prepare</font><font color="#007700">(</font><font color="#DD0000">"SELECT District FROM City WHERE Name=?"</font><font color="#007700">)) {<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* bind parameters for markers */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$stmt</font><font color="#007700">-&gt;</font><font color="#0000BB">bind_param</font><font color="#007700">(</font><font color="#DD0000">"s"</font><font color="#007700">, </font><font color="#0000BB">$city</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* execute query */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$stmt</font><font color="#007700">-&gt;</font><font color="#0000BB">execute</font><font color="#007700">();<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* bind result variables */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$stmt</font><font color="#007700">-&gt;</font><font color="#0000BB">bind_result</font><font color="#007700">(</font><font color="#0000BB">$district</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* fetch value */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$stmt</font><font color="#007700">-&gt;</font><font color="#0000BB">fetch</font><font color="#007700">();<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"%s is in district %s\n"</font><font color="#007700">, </font><font color="#0000BB">$city</font><font color="#007700">, </font><font color="#0000BB">$district</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* close statement */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$stmt</font><font color="#007700">-&gt;</font><font color="#0000BB">close</font><font color="#007700">();<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">close</font><font color="#007700">();<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN142679"
></A
><P
><B
>例 2. Procedural style</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$link </font><font color="#007700">= </font><font color="#0000BB">mysqli_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">mysqli_connect_errno</font><font color="#007700">()) {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_connect_error</font><font color="#007700">());<br />&nbsp;&nbsp;&nbsp;&nbsp;exit();<br />}<br /><br /></font><font color="#0000BB">$city </font><font color="#007700">= </font><font color="#DD0000">"Amersfoort"</font><font color="#007700">;<br /><br /></font><font color="#FF8000">/* create a prepared statement */<br /></font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">mysqli_stmt_init</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">);<br />if (</font><font color="#0000BB">mysqli_stmt_prepare</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#DD0000">'SELECT District FROM City WHERE Name=?'</font><font color="#007700">)) {<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* bind parameters for markers */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">mysqli_stmt_bind_param</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#DD0000">"s"</font><font color="#007700">, </font><font color="#0000BB">$city</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* execute query */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">mysqli_stmt_execute</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* bind result variables */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">mysqli_stmt_bind_result</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#0000BB">$district</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* fetch value */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">mysqli_stmt_fetch</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"%s is in district %s\n"</font><font color="#007700">, </font><font color="#0000BB">$city</font><font color="#007700">, </font><font color="#0000BB">$district</font><font color="#007700">);<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">/* close statement */<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">mysqli_stmt_close</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br />}<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">mysqli_close</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
><P
>上例将输出：</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>Amersfoort is in district Utrecht</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN142684"
></A
><H2
>参见</H2
><P
>&#13;   <A
HREF="function.mysqli-stmt-init.html"
><B
CLASS="function"
>mysqli_stmt_init()</B
></A
>,
   <A
HREF="function.mysqli-stmt-execute.html"
><B
CLASS="function"
>mysqli_stmt_execute()</B
></A
>,
   <A
HREF="function.mysqli-stmt-fetch.html"
><B
CLASS="function"
>mysqli_stmt_fetch()</B
></A
>,
   <A
HREF="function.mysqli-stmt-bind-param.html"
><B
CLASS="function"
>mysqli_stmt_bind_param()</B
></A
>,
   <A
HREF="function.mysqli-stmt-bind-result.html"
><B
CLASS="function"
>mysqli_stmt_bind_result()</B
></A
>
   <A
HREF="function.mysqli-stmt-close.html"
><B
CLASS="function"
>mysqli_stmt_close()</B
></A
>.
  </P
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