Sophie: php-manual-zh-5.2.4-1mdv2008.1 noarch

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

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><H1
><A
NAME="function.mysqli-affected-rows"
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>mysqli_affected_rows</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN137385"
></A
><P
>    (PHP 5)</P
>mysqli_affected_rows<P
>    (no version information, might be only in CVS)</P
>mysqli-&#62;affected_rows&nbsp;--&nbsp;Gets the number of affected rows in a previous MySQL operation</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN137389"
></A
><H2
>说明</H2
><P
>Procedural style:</P
>int <B
CLASS="methodname"
>mysqli_affected_rows</B
> ( mysqli link )<BR
></BR
><P
>Object oriented style (property):</P
>class <B
CLASS="classname"
>mysqli</B
> { <BR
></BR
>int affected_rows<BR
></BR
>}<P
>&#13;   Returns the number of rows affected by the last <TT
CLASS="literal"
>INSERT</TT
>,
   <TT
CLASS="literal"
>UPDATE</TT
>, <TT
CLASS="literal"
>REPLACE</TT
> or 
   <TT
CLASS="literal"
>DELETE</TT
> query.
  </P
><P
>&#13;   This function only works with queries which modify a table. In order to
   return the number of rows from a <TT
CLASS="literal"
>SELECT</TT
> query, use the
   <A
HREF="function.mysqli-num-rows.html"
><B
CLASS="function"
>mysqli_num_rows()</B
></A
> function instead.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN137413"
></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
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN137424"
></A
><H2
>返回值</H2
><P
>&#13;   An integer greater than zero indicates the number of rows affected or
   retrieved.
   Zero indicates that no records where updated for an UPDATE statement, no
   rows matched the <TT
CLASS="literal"
>WHERE</TT
> clause in the query or that no
   query has yet been executed. -1 indicates that the query returned an
   error.
  </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
    If the number of affected rows is greater than maximal int value, the
    number of affected rows will be returned as a string.
   </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN137430"
></A
><H2
>范例</H2
><TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN137432"
></A
><P
><B
>例 1. Object oriented style</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$mysqli </font><font color="#007700">= new </font><font color="#0000BB">mysqli</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* check connection */<br /></font><font color="#007700">if (</font><font color="#0000BB">mysqli_connect_errno</font><font color="#007700">()) {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Connect failed: %s\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_connect_error</font><font color="#007700">());<br />&nbsp;&nbsp;&nbsp;&nbsp;exit();<br />}<br /><br /></font><font color="#FF8000">/* Insert rows */<br /></font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"CREATE TABLE Language SELECT * from CountryLanguage"</font><font color="#007700">);<br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Affected rows (INSERT): %d\n"</font><font color="#007700">, </font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">affected_rows</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"ALTER TABLE Language ADD Status int default 0"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* update rows */<br /></font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"UPDATE Language SET Status=1 WHERE Percentage &gt; 50"</font><font color="#007700">);<br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Affected rows (UPDATE): %d\n"</font><font color="#007700">, </font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">affected_rows</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* delete rows */<br /></font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"DELETE FROM Language WHERE Percentage &lt; 50"</font><font color="#007700">);<br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Affected rows (DELETE): %d\n"</font><font color="#007700">, </font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">affected_rows</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* select all rows */<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"SELECT CountryCode FROM Language"</font><font color="#007700">);<br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Affected rows (SELECT): %d\n"</font><font color="#007700">, </font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">affected_rows</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$result</font><font color="#007700">-&gt;</font><font color="#0000BB">close</font><font color="#007700">();<br /><br /></font><font color="#FF8000">/* Delete table Language */<br /></font><font color="#0000BB">$mysqli</font><font color="#007700">-&gt;</font><font color="#0000BB">query</font><font color="#007700">(</font><font color="#DD0000">"DROP TABLE Language"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* close connection */<br /></font><font color="#0000BB">$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="AEN137435"
></A
><P
><B
>例 2. Procedural style</B
></P
><TABLE
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$link </font><font color="#007700">= </font><font color="#0000BB">mysqli_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"my_user"</font><font color="#007700">, </font><font color="#DD0000">"my_password"</font><font color="#007700">, </font><font color="#DD0000">"world"</font><font color="#007700">);<br /><br />if (!</font><font color="#0000BB">$link</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Can't connect to localhost. Error: %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="#FF8000">/* Insert rows */<br /></font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"CREATE TABLE Language SELECT * from CountryLanguage"</font><font color="#007700">);<br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Affected rows (INSERT): %d\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_affected_rows</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">));<br /><br /></font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"ALTER TABLE Language ADD Status int default 0"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* update rows */<br /></font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"UPDATE Language SET Status=1 WHERE Percentage &gt; 50"</font><font color="#007700">);<br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Affected rows (UPDATE): %d\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_affected_rows</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">));<br /><br /></font><font color="#FF8000">/* delete rows */<br /></font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"DELETE FROM Language WHERE Percentage &lt; 50"</font><font color="#007700">);<br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Affected rows (DELETE): %d\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_affected_rows</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">));<br /><br /></font><font color="#FF8000">/* select all rows */<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"SELECT CountryCode FROM Language"</font><font color="#007700">);<br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Affected rows (SELECT): %d\n"</font><font color="#007700">, </font><font color="#0000BB">mysqli_affected_rows</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">));<br /><br /></font><font color="#0000BB">mysqli_free_result</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Delete table Language */<br /></font><font color="#0000BB">mysqli_query</font><font color="#007700">(</font><font color="#0000BB">$link</font><font color="#007700">, </font><font color="#DD0000">"DROP TABLE Language"</font><font color="#007700">);<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"
>Affected rows (INSERT): 984
Affected rows (UPDATE): 168
Affected rows (DELETE): 815
Affected rows (SELECT): 169</PRE
></TD
></TR
></TABLE
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN137440"
></A
><H2
>参见</H2
><P
>&#13;   <P
></P
><TABLE
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><TBODY
><TR
><TD
><A
HREF="function.mysqli-num-rows.html"
><B
CLASS="function"
>mysqli_num_rows()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysqli-info.html"
><B
CLASS="function"
>mysqli_info()</B
></A
></TD
></TR
></TBODY
></TABLE
><P
></P
>
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