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

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><H1
><A
NAME="function.PDOStatement-bindParam"
></A
>PDOStatement-&#62;bindParam()</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN177197"
></A
><P
>    (no version information, might be only in CVS)</P
>PDOStatement-&#62;bindParam()&nbsp;--&nbsp;
   Binds a parameter to the specified variable name
  </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN177200"
></A
><H2
>说明</H2
>class <B
CLASS="classname"
>PDOStatement</B
> { <BR
></BR
>bool <B
CLASS="methodname"
>bindParam</B
> ( mixed parameter, mixed &#38;variable [, int data_type [, int length [, mixed driver_options]]] )<BR
></BR
>}<P
>&#13;   Binds a PHP variable to a corresponding named or question mark placeholder
   in the SQL statement that was use to prepare the statement.  Unlike
   <A
HREF="function.pdostatement-bindvalue.html"
>PDOStatement-&#62;bindValue()</A
>, the variable is bound as a
   reference and will only be evaluated at the time that
   <A
HREF="function.pdostatement-execute.html"
>PDOStatement-&#62;execute()</A
> is called.
  </P
><P
>&#13;   Most parameters are input parameters, that is, parameters that are used
   in a read-only fashion to build up the query.  Some drivers support the
   invocation of stored procedures that return data as output parameters,
   and some also as input/output parameters that both send in data and are
   updated to receive it.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN177227"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>parameter</CODE
></DT
><DD
><P
>&#13;        Parameter identifier. For a prepared statement using named
        placeholders, this will be a parameter name of the form
        <CODE
CLASS="varname"
>:name</CODE
>. For a prepared statement using
        question mark placeholders, this will be the 1-indexed position of
        the parameter. 
       </P
></DD
><DT
><CODE
CLASS="parameter"
>variable</CODE
></DT
><DD
><P
>&#13;        Name of the PHP variable to bind to the SQL statement parameter.
       </P
></DD
><DT
><CODE
CLASS="parameter"
>data_type</CODE
></DT
><DD
><P
>&#13;        Explicit data type for the parameter using the PDO::PARAM_*
        constants. To return an INOUT parameter from a stored procedure, 
        use the bitwise OR operator to set the PDO::PARAM_INPUT_OUTPUT bits
        for the <CODE
CLASS="parameter"
>data_type</CODE
> parameter.
       </P
></DD
><DT
><CODE
CLASS="parameter"
>length</CODE
></DT
><DD
><P
>&#13;        Length of the data type. To indicate that a parameter is an OUT
        parameter from a stored procedure, you must explicitly set the
        length.
       </P
></DD
><DT
><CODE
CLASS="parameter"
>driver_options</CODE
></DT
><DD
><P
>&#13;         
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN177258"
></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="AEN177263"
></A
><H2
>范例</H2
><TABLE
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><TD
><DIV
CLASS="example"
><A
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></A
><P
><B
>例 1. Execute a prepared statement with named placeholders</B
></P
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">/* Execute a prepared statement by binding PHP variables */<br /></font><font color="#0000BB">$calories </font><font color="#007700">= </font><font color="#0000BB">150</font><font color="#007700">;<br /></font><font color="#0000BB">$colour </font><font color="#007700">= </font><font color="#DD0000">'red'</font><font color="#007700">;<br /></font><font color="#0000BB">$sth </font><font color="#007700">= </font><font color="#0000BB">$dbh</font><font color="#007700">-&gt;</font><font color="#0000BB">prepare</font><font color="#007700">(</font><font color="#DD0000">'SELECT name, colour, calories<br />&nbsp;&nbsp;&nbsp;&nbsp;FROM fruit<br />&nbsp;&nbsp;&nbsp;&nbsp;WHERE calories &lt; :calories AND colour = :colour'</font><font color="#007700">);<br /></font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">bindParam</font><font color="#007700">(</font><font color="#DD0000">':calories'</font><font color="#007700">, </font><font color="#0000BB">$calories</font><font color="#007700">, </font><font color="#0000BB">PDO</font><font color="#007700">::</font><font color="#0000BB">PARAM_INT</font><font color="#007700">);<br /></font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">bindParam</font><font color="#007700">(</font><font color="#DD0000">':colour'</font><font color="#007700">, </font><font color="#0000BB">$colour</font><font color="#007700">, </font><font color="#0000BB">PDO</font><font color="#007700">::</font><font color="#0000BB">PARAM_STR</font><font color="#007700">, </font><font color="#0000BB">12</font><font color="#007700">);<br /></font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">execute</font><font color="#007700">();<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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><TD
><DIV
CLASS="example"
><A
NAME="AEN177268"
></A
><P
><B
>例 2. Execute a prepared statement with question mark placeholders</B
></P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">/* Execute a prepared statement by binding PHP variables */<br /></font><font color="#0000BB">$calories </font><font color="#007700">= </font><font color="#0000BB">150</font><font color="#007700">;<br /></font><font color="#0000BB">$colour </font><font color="#007700">= </font><font color="#DD0000">'red'</font><font color="#007700">;<br /></font><font color="#0000BB">$sth </font><font color="#007700">= </font><font color="#0000BB">$dbh</font><font color="#007700">-&gt;</font><font color="#0000BB">prepare</font><font color="#007700">(</font><font color="#DD0000">'SELECT name, colour, calories<br />&nbsp;&nbsp;&nbsp;&nbsp;FROM fruit<br />&nbsp;&nbsp;&nbsp;&nbsp;WHERE calories &lt; ? AND colour = ?'</font><font color="#007700">);<br /></font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">bindParam</font><font color="#007700">(</font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">$calories</font><font color="#007700">, </font><font color="#0000BB">PDO</font><font color="#007700">::</font><font color="#0000BB">PARAM_INT</font><font color="#007700">);<br /></font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">bindParam</font><font color="#007700">(</font><font color="#0000BB">2</font><font color="#007700">, </font><font color="#0000BB">$colour</font><font color="#007700">, </font><font color="#0000BB">PDO</font><font color="#007700">::</font><font color="#0000BB">PARAM_STR</font><font color="#007700">, </font><font color="#0000BB">12</font><font color="#007700">);<br /></font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">execute</font><font color="#007700">();<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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><A
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></A
><P
><B
>例 3. Call a stored procedure with an INOUT parameter</B
></P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">/* Call a stored procedure with an INOUT parameter */<br /></font><font color="#0000BB">$colour </font><font color="#007700">= </font><font color="#DD0000">'red'</font><font color="#007700">;<br /></font><font color="#0000BB">$sth </font><font color="#007700">= </font><font color="#0000BB">$dbh</font><font color="#007700">-&gt;</font><font color="#0000BB">prepare</font><font color="#007700">(</font><font color="#DD0000">'CALL puree_fruit(?)'</font><font color="#007700">);<br /></font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">bindParam</font><font color="#007700">(</font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">$colour</font><font color="#007700">, </font><font color="#0000BB">PDO</font><font color="#007700">::</font><font color="#0000BB">PARAM_STR</font><font color="#007700">|</font><font color="#0000BB">PDO</font><font color="#007700">::</font><font color="#0000BB">PARAM_INPUT_OUTPUT</font><font color="#007700">, </font><font color="#0000BB">12</font><font color="#007700">);<br /></font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">execute</font><font color="#007700">();<br />print(</font><font color="#DD0000">"After pureeing fruit, the colour is: $colour"</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
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></TD
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></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN177274"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
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><TBODY
><TR
><TD
><A
HREF="function.pdo-prepare.html"
>PDO-&#62;prepare()</A
></TD
></TR
><TR
><TD
><A
HREF="function.pdostatement-execute.html"
>PDOStatement-&#62;execute()</A
></TD
></TR
><TR
><TD
><A
HREF="function.pdostatement-bindvalue.html"
>PDOStatement-&#62;bindValue()</A
></TD
></TR
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><P
></P
>
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