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

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><H1
><A
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></A
>mysqli_prepare</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN140493"
></A
><P
>    (PHP 5)</P
>mysqli_prepare<P
>    (no version information, might be only in CVS)</P
>mysqli-&#62;prepare()&nbsp;--&nbsp;Prepare a SQL statement for execution</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN140497"
></A
><H2
>说明</H2
><P
>Procedure style:</P
>mysqli_stmt <B
CLASS="methodname"
>mysqli_prepare</B
> ( mysqli link, string query )<BR
></BR
><P
>Object oriented style (method)</P
>class <B
CLASS="classname"
>mysqli</B
> { <BR
></BR
>mysqli_stmt <B
CLASS="methodname"
>prepare</B
> ( string query )<BR
></BR
>}<P
>&#13;   Prepares the SQL query pointed to by the null-terminated string query, and
   returns a statement handle to be used for further operations on the
   statement. The query must consist of a single SQL statement.
  </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="AEN140523"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>&#13;link</CODE
></DT
><DD
><P
>Procedural style only: A link identifier
returned by <A
HREF="function.mysqli-connect.html"
><B
CLASS="function"
>mysqli_connect()</B
></A
> or <A
HREF="function.mysqli-init.html"
><B
CLASS="function"
>mysqli_init()</B
></A
>
</P
></DD
><DT
><CODE
CLASS="parameter"
>query</CODE
></DT
><DD
><P
>&#13;       The query, as a string.
      </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
><P
>&#13;       This parameter 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
>
        The markers are legal only in certain places in SQL statements.
        For example, they are allowed in the <TT
CLASS="literal"
>VALUES()</TT
>
        list of an <TT
CLASS="literal"
>INSERT</TT
> statement (to specify column
        values for a row), or in a comparison with a column in a
        <TT
CLASS="literal"
>WHERE</TT
> 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 <TT
CLASS="literal"
>SELECT</TT
> 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. It's not allowed to
        compare marker with <TT
CLASS="literal"
>NULL</TT
> by 
        <TT
CLASS="literal"
>? IS NULL</TT
> too. 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="AEN140554"
></A
><H2
>返回值</H2
><P
>&#13;   <B
CLASS="function"
>mysqli_prepare()</B
> returns a statement object or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> if an error occured.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN140559"
></A
><H2
>范例</H2
><TABLE
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CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN140561"
></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="#007700">if (</font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">$mysqli</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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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN140564"
></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="#007700">if (</font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">mysqli_prepare</font><font color="#007700">(</font><font color="#0000BB">$link</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="AEN140569"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.mysqli-stmt-execute.html"
><B
CLASS="function"
>mysqli_stmt_execute()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-stmt-fetch.html"
><B
CLASS="function"
>mysqli_stmt_fetch()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-stmt-bind-param.html"
><B
CLASS="function"
>mysqli_stmt_bind_param()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-stmt-bind-result.html"
><B
CLASS="function"
>mysqli_stmt_bind_result()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-stmt-close.html"
><B
CLASS="function"
>mysqli_stmt_close()</B
></A
></TD
></TR
></TBODY
></TABLE
><P
></P
>
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