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

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><H1
><A
NAME="function.PDOStatement-fetchAll"
></A
>PDOStatement-&#62;fetchAll()</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN177702"
></A
><P
>    (no version information, might be only in CVS)</P
>PDOStatement-&#62;fetchAll()&nbsp;--&nbsp;
   Returns an array containing all of the result set rows
  </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN177705"
></A
><H2
>说明</H2
>class <B
CLASS="classname"
>PDOStatement</B
> { <BR
></BR
>array <B
CLASS="methodname"
>fetchAll</B
> ( [int fetch_style [, int column_index]] )<BR
></BR
>}</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN177719"
></A
><H2
>参数</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>fetch_style</CODE
></DT
><DD
><P
>&#13;       Controls the contents of the returned array as documented in
       <A
HREF="function.pdostatement-fetch.html"
>PDOStatement-&#62;fetch()</A
>. Defaults to
       <TT
CLASS="literal"
>PDO::FETCH_BOTH</TT
>.
      </P
><P
>&#13;       To return an array consisting of all values of a single column from
       the result set, specify <TT
CLASS="literal"
>PDO::FETCH_COLUMN</TT
>. You
       can specify which column you want with the
       <CODE
CLASS="parameter"
>column-index</CODE
> parameter.
      </P
><P
>&#13;       To fetch only the unique values of a single column from the result set,
       bitwise-OR <TT
CLASS="literal"
>PDO::FETCH_COLUMN</TT
> with
       <TT
CLASS="literal"
>PDO::FETCH_UNIQUE</TT
>.
      </P
><P
>&#13;       To return an associative array grouped by the values of a specified
       column, bitwise-OR <TT
CLASS="literal"
>PDO::FETCH_COLUMN</TT
> with
       <TT
CLASS="literal"
>PDO::FETCH_GROUP</TT
>.
      </P
></DD
><DT
><CODE
CLASS="parameter"
>column_index</CODE
></DT
><DD
><P
>&#13;       Returns the indicated 0-indexed column when the value of
       <CODE
CLASS="parameter"
>fetch_style</CODE
> is
       <TT
CLASS="literal"
>PDO::FETCH_COLUMN</TT
>. Defaults to <TT
CLASS="literal"
>0</TT
>.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN177747"
></A
><H2
>返回值</H2
><P
>&#13;   <A
HREF="function.pdostatement-fetchall.html"
>PDOStatement-&#62;fetchAll()</A
> returns an array containing
   all of the remaining rows in the result set. The array represents each
   row as either an array of column values or an object with properties
   corresponding to each column name.
  </P
><P
>&#13;   Using this method to fetch large result sets will result in a heavy
   demand on system and possibly network resources. Rather than retrieving
   all of the data and manipulating it in PHP, consider using the database
   server to manipulate the result sets. For example, use the WHERE and
   SORT BY clauses in SQL to restrict results before retrieving and
   processing them with PHP.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN177752"
></A
><H2
>范例</H2
><P
>&#13;   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN177755"
></A
><P
><B
>例 1. Fetch all remaining rows in a result set</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$sth </font><font color="#007700">= </font><font color="#0000BB">$dbh</font><font color="#007700">-&gt;</font><font color="#0000BB">prepare</font><font color="#007700">(</font><font color="#DD0000">"SELECT name, colour FROM fruit"</font><font color="#007700">);<br /></font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">execute</font><font color="#007700">();<br /><br /></font><font color="#FF8000">/* Fetch all of the remaining rows in the result set */<br /></font><font color="#007700">print(</font><font color="#DD0000">"Fetch all of the remaining rows in the result set:\n"</font><font color="#007700">);<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">fetchAll</font><font color="#007700">();<br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>上例将输出：</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>Fetch all of the remaining rows in the result set:
Array
(
    [0] =&#62; Array
        (
            [NAME] =&#62; pear
            [0] =&#62; pear
            [COLOUR] =&#62; green
            [1] =&#62; green
        )

    [1] =&#62; Array
        (
            [NAME] =&#62; watermelon
            [0] =&#62; watermelon
            [COLOUR] =&#62; pink
            [1] =&#62; pink
        )

)</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN177760"
></A
><P
><B
>例 2. Fetching all values of a single column from a result set</B
></P
><P
>&#13;     The following example demonstrates how to return all of the values of a
     single column from a result set, even though the SQL statement itself
     may return multiple columns per row.
    </P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$sth </font><font color="#007700">= </font><font color="#0000BB">$dbh</font><font color="#007700">-&gt;</font><font color="#0000BB">prepare</font><font color="#007700">(</font><font color="#DD0000">"SELECT name, colour FROM fruit"</font><font color="#007700">);<br /></font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">execute</font><font color="#007700">();<br /><br /></font><font color="#FF8000">/* Fetch all of the values of the first column */<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">fetchAll</font><font color="#007700">(</font><font color="#0000BB">PDO</font><font color="#007700">::</font><font color="#0000BB">FETCH_COLUMN</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">);<br /></font><font color="#0000BB">var_dump</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>上例将输出：</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>Array(3)
(
    [0] =&#62;
    string(5) =&#62; apple
    [1] =&#62;
    string(4) =&#62; pear
    [2] =&#62;
    string(10) =&#62; watermelon
)</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
   <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN177766"
></A
><P
><B
>例 3. Grouping all values by a single column</B
></P
><P
>&#13;     The following example demonstrates how to return an associative array
     grouped by the values of the specified column in the result set. The
     array contains three keys: values <TT
CLASS="literal"
>apple</TT
> and
     <TT
CLASS="literal"
>pear</TT
> are returned as arrays that contain two
     different colours, while <TT
CLASS="literal"
>watermelon</TT
> is
     returned as an array that contains only one colour.
    </P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$insert </font><font color="#007700">= </font><font color="#0000BB">$dbh</font><font color="#007700">-&gt;</font><font color="#0000BB">prepare</font><font color="#007700">(</font><font color="#DD0000">"INSERT INTO fruit(name, colour) VALUES (?, ?)"</font><font color="#007700">);<br /></font><font color="#0000BB">$insert</font><font color="#007700">-&gt;</font><font color="#0000BB">execute</font><font color="#007700">(</font><font color="#DD0000">'apple'</font><font color="#007700">, </font><font color="#DD0000">'green'</font><font color="#007700">);<br /></font><font color="#0000BB">$insert</font><font color="#007700">-&gt;</font><font color="#0000BB">execute</font><font color="#007700">(</font><font color="#DD0000">'pear'</font><font color="#007700">, </font><font color="#DD0000">'yellow'</font><font color="#007700">);<br /><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 FROM fruit"</font><font color="#007700">);<br /></font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">execute</font><font color="#007700">();<br /><br /></font><font color="#FF8000">/* Group values by the first column */<br /></font><font color="#0000BB">var_dump</font><font color="#007700">(</font><font color="#0000BB">$sth</font><font color="#007700">-&gt;</font><font color="#0000BB">fetchAll</font><font color="#007700">(</font><font color="#0000BB">PDO</font><font color="#007700">::</font><font color="#0000BB">FETCH_COLUMN</font><font color="#007700">|</font><font color="#0000BB">PDO</font><font color="#007700">::</font><font color="#0000BB">FETCH_GROUP</font><font color="#007700">));<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>上例将输出：</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>array(3) {
  ["apple"]=&#62;
  array(2) {
    [0]=&#62;
    string(5) "green"
    [1]=&#62;
    string(3) "red"
  }
  ["pear"]=&#62;
  array(2) {
    [0]=&#62;
    string(5) "green"
    [1]=&#62;
    string(6) "yellow"
  }
  ["watermelon"]=&#62;
  array(1) {
    [0]=&#62;
    string(5) "green"
  }
}</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>

  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN177775"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.pdo-query.html"
>PDO-&#62;query()</A
></TD
></TR
><TR
><TD
><A
HREF="function.pdostatement-fetch.html"
>PDOStatement-&#62;fetch()</A
></TD
></TR
><TR
><TD
><A
HREF="function.pdostatement-fetchcolumn.html"
>PDOStatement-&#62;fetchColumn()</A
></TD
></TR
><TR
><TD
><A
HREF="function.pdo-prepare.html"
>PDO-&#62;prepare()</A
></TD
></TR
><TR
><TD
><A
HREF="function.pdostatement-setfetchmode.html"
>PDOStatement-&#62;setFetchMode()</A
></TD
></TR
></TBODY
></TABLE
><P
></P
>
  </P
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