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><H1
><A
NAME="function.mysql-affected-rows"
></A
>mysql_affected_rows</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN66533"
></A
><P
>    (PHP 3, PHP 4 , PHP 5)</P
>mysql_affected_rows&nbsp;--&nbsp;Get number of affected rows in previous MySQL
     operation</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN66536"
></A
><H2
>Description</H2
>int <B
CLASS="methodname"
>mysql_affected_rows</B
> ( [resource link_identifier])<BR
></BR
><P
>&#13;     <B
CLASS="function"
>mysql_affected_rows()</B
> returns the number
     of rows affected by the last INSERT, UPDATE or DELETE query
     associated with <VAR
CLASS="parameter"
>link_identifier</VAR
>.  If the
     link identifier isn't specified, the last link opened by
     <A
HREF="function.mysql-connect.html"
><B
CLASS="function"
>mysql_connect()</B
></A
> is assumed.
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Not&#227;: </B
>
      If you are using transactions, you need to call
      <B
CLASS="function"
>mysql_affected_rows()</B
> after your INSERT,
      UPDATE, or DELETE query, not after the commit.
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     If the last query was a DELETE query with no WHERE clause, all
     of the records will have been deleted from the table but this
     function will return zero.
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Not&#227;: </B
>
      When using UPDATE, MySQL will not update columns where the new
      value is the same as the old value.  This creates the possibility
      that <B
CLASS="function"
>mysql_affected_rows()</B
> may not actually
      equal the number of rows matched, only the number of rows that
      were literally affected by the query.
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     <B
CLASS="function"
>mysql_affected_rows()</B
> does not work with
     SELECT statements; only on statements which modify records. To
     retrieve the number of rows returned by a SELECT, use
     <A
HREF="function.mysql-num-rows.html"
><B
CLASS="function"
>mysql_num_rows()</B
></A
>.
    </P
><P
>&#13;     If the last query failed, this function will return -1.
     <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN66559"
></A
><P
><B
>Exemplu 1. Delete-Query</B
></P
><TABLE
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CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">/* connect to database */<br /></font><font color="#0000BB">$link </font><font color="#007700">= </font><font color="#0000BB">mysql_connect</font><font color="#007700">(</font><font color="#DD0000">'localhost'</font><font color="#007700">, </font><font color="#DD0000">'mysql_user'</font><font color="#007700">, </font><font color="#DD0000">'mysql_password'</font><font color="#007700">);<br />if (!</font><font color="#0000BB">$link</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;die(</font><font color="#DD0000">'Could not connect: ' </font><font color="#007700">. </font><font color="#0000BB">mysql_error</font><font color="#007700">());<br />}<br /></font><font color="#0000BB">mysql_select_db</font><font color="#007700">(</font><font color="#DD0000">'mydb'</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* this should return the correct numbers of deleted records */<br /></font><font color="#0000BB">mysql_query</font><font color="#007700">(</font><font color="#DD0000">'DELETE FROM mytable WHERE id &lt; 10'</font><font color="#007700">);<br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Records deleted: %d\n"</font><font color="#007700">, </font><font color="#0000BB">mysql_affected_rows</font><font color="#007700">());<br /><br /></font><font color="#FF8000">/* with a where clause that is never true, it should return 0 */<br /></font><font color="#0000BB">mysql_query</font><font color="#007700">(</font><font color="#DD0000">'DELETE FROM mytable WHERE 0'</font><font color="#007700">);<br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"Records deleted: %d\n"</font><font color="#007700">, </font><font color="#0000BB">mysql_affected_rows</font><font color="#007700">());<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>&#13;       The above example would produce the following output:
      </P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>Records deleted: 10
Records deleted: 0</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
    </P
><P
>&#13;     <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN66565"
></A
><P
><B
>Exemplu 2. Update-Query</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /></font><font color="#FF8000">/* connect to database */<br /></font><font color="#0000BB">mysql_connect</font><font color="#007700">(</font><font color="#DD0000">"localhost"</font><font color="#007700">, </font><font color="#DD0000">"mysql_user"</font><font color="#007700">, </font><font color="#DD0000">"mysql_password"</font><font color="#007700">) or<br />&nbsp;&nbsp;&nbsp;&nbsp;die(</font><font color="#DD0000">"Could not connect: " </font><font color="#007700">. </font><font color="#0000BB">mysql_error</font><font color="#007700">());<br /></font><font color="#0000BB">mysql_select_db</font><font color="#007700">(</font><font color="#DD0000">"mydb"</font><font color="#007700">);<br /><br /></font><font color="#FF8000">/* Update records */<br /></font><font color="#0000BB">mysql_query</font><font color="#007700">(</font><font color="#DD0000">"UPDATE mytable SET used=1 WHERE id &lt; 10"</font><font color="#007700">);<br /></font><font color="#0000BB">printf </font><font color="#007700">(</font><font color="#DD0000">"Updated records: %d\n"</font><font color="#007700">, </font><font color="#0000BB">mysql_affected_rows</font><font color="#007700">());<br /></font><font color="#0000BB">mysql_query</font><font color="#007700">(</font><font color="#DD0000">"COMMIT"</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>&#13;       The above example would produce the following output:
      </P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>Updated Records: 10</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
> 
    </P
><P
>&#13;     See also <A
HREF="function.mysql-num-rows.html"
><B
CLASS="function"
>mysql_num_rows()</B
></A
>, and
     <A
HREF="function.mysql-info.html"
><B
CLASS="function"
>mysql_info()</B
></A
>.
    </P
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