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

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>mysql_data_seek</TITLE
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><H1
><A
NAME="function.mysql-data-seek"
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>mysql_data_seek</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN129619"
></A
><P
>    (PHP 3, PHP 4, PHP 5)</P
>mysql_data_seek&nbsp;--&nbsp;Move o ponteiro interno do resultado</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN129622"
></A
><H2
>Descrição</H2
>bool <B
CLASS="methodname"
>mysql_data_seek</B
> ( resource result, int row_number )<BR
></BR
><P
>&#13;   <B
CLASS="function"
>mysql_data_seek()</B
> move o ponteiro interno
   das linhas de um resultado MySQL associado ao identificador de resultado dado
   para o número da linha especificado. A próxima chamada a
   uma função MySQL que retorne resultado, como <A
HREF="function.mysql-fetch-assoc.html"
><B
CLASS="function"
>mysql_fetch_assoc()</B
></A
>,
   irá retornar esta linha.
  </P
><P
>&#13;   <CODE
CLASS="parameter"
>row_number</CODE
> começa em 0. O 
   <CODE
CLASS="parameter"
>row_number</CODE
> deve ser um valor no intervalo de 0 a
   <A
HREF="function.mysql-num-rows.html"
><B
CLASS="function"
>mysql_num_rows()</B
></A
> - 1. Entretanto, se o conjunto de reseultados
   for vazio (<A
HREF="function.mysql-num-rows.html"
><B
CLASS="function"
>mysql_num_rows()</B
></A
> == 0), uma busca para 0 
   irá falhar com um <A
HREF="ref.errorfunc.html#e-warning"
>E_WARNING</A
> e 
   <B
CLASS="function"
>mysql_data_seek()</B
> iá retornar <TT
CLASS="constant"
><B
>FALSE</B
></TT
>.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN129644"
></A
><H2
>Parâmetros</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>&#13; result</CODE
></DT
><DD
><P
>O resulatado <A
HREF="language.types.resource.html"
><B
CLASS="type"
>resource</B
></A
> que
 esta sendo avaliado. Este resultado vem de uma chamada a
 <A
HREF="function.mysql-query.html"
><B
CLASS="function"
>mysql_query()</B
></A
>.</P
></DD
><DT
><CODE
CLASS="parameter"
>row_number</CODE
></DT
><DD
><P
>&#13;       O número de linha desejado para o ponteiro de resultado.
      </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN129660"
></A
><H2
>Valores de retornado</H2
><P
>&#13;   Retorna <TT
CLASS="constant"
><B
>TRUE</B
></TT
> em caso de sucesso ou <TT
CLASS="constant"
><B
>FALSE</B
></TT
> em falhas.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN129665"
></A
><H2
>Exemplos</H2
><P
>&#13;   <TABLE
WIDTH="100%"
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN129668"
></A
><P
><B
>Exemplo 1. Exemplo <B
CLASS="function"
>mysql_data_seek()</B
></B
></P
><TABLE
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$link </font><font color="#007700">= </font><font color="#0000BB">mysql_connect</font><font color="#007700">(</font><font color="#DD0000">'localhost'</font><font color="#007700">, </font><font color="#DD0000">'mysql_user'</font><font color="#007700">, </font><font color="#DD0000">'mysql_password'</font><font color="#007700">);<br />if (!</font><font color="#0000BB">$link</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;die(</font><font color="#DD0000">'Não foi possível conectar: ' </font><font color="#007700">. </font><font color="#0000BB">mysql_error</font><font color="#007700">());<br />}<br /></font><font color="#0000BB">$db_selected </font><font color="#007700">= </font><font color="#0000BB">mysql_select_db</font><font color="#007700">(</font><font color="#DD0000">'sample_db'</font><font color="#007700">);<br />if (!</font><font color="#0000BB">$db_selected</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;die(</font><font color="#DD0000">'Não foi possível selecionar o banco de dados: ' </font><font color="#007700">. </font><font color="#0000BB">mysql_error</font><font color="#007700">());<br />}<br /></font><font color="#0000BB">$query </font><font color="#007700">= </font><font color="#DD0000">'SELECT last_name, first_name FROM friends'</font><font color="#007700">;<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">mysql_query</font><font color="#007700">(</font><font color="#0000BB">$query</font><font color="#007700">);<br />if (!</font><font color="#0000BB">$result</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;die(</font><font color="#DD0000">'A consulta falhou: ' </font><font color="#007700">. </font><font color="#0000BB">mysql_error</font><font color="#007700">());<br />}<br /></font><font color="#FF8000">/* obtém as linhas em ordem reversa */<br /></font><font color="#007700">for (</font><font color="#0000BB">$i </font><font color="#007700">= </font><font color="#0000BB">mysql_num_rows</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">) - </font><font color="#0000BB">1</font><font color="#007700">; </font><font color="#0000BB">$i </font><font color="#007700">&gt;= </font><font color="#0000BB">0</font><font color="#007700">; </font><font color="#0000BB">$i</font><font color="#007700">--) {<br />&nbsp;&nbsp;&nbsp;&nbsp;if (!</font><font color="#0000BB">mysql_data_seek</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">, </font><font color="#0000BB">$i</font><font color="#007700">)) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"Não foi possível mover para a linha $i: " </font><font color="#007700">. </font><font color="#0000BB">mysql_error</font><font color="#007700">() . </font><font color="#DD0000">"\n"</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;continue;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;if (!(</font><font color="#0000BB">$row </font><font color="#007700">= </font><font color="#0000BB">mysql_fetch_assoc</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">))) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;continue;<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br /><br />&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#0000BB">$row</font><font color="#007700">[</font><font color="#DD0000">'last_name'</font><font color="#007700">] . </font><font color="#DD0000">' ' </font><font color="#007700">. </font><font color="#0000BB">$row</font><font color="#007700">[</font><font color="#DD0000">'first_name'</font><font color="#007700">] . </font><font color="#DD0000">"&lt;br /&gt;\n"</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">mysql_free_result</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
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>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN129672"
></A
><H2
>Notas</H2
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>
    A função <B
CLASS="function"
>mysql_data_seek()</B
> pode ser usada apenas
    em conjunto com a função <A
HREF="function.mysql-query.html"
><B
CLASS="function"
>mysql_query()</B
></A
>, não com
    <A
HREF="function.mysql-unbuffered-query.html"
><B
CLASS="function"
>mysql_unbuffered_query()</B
></A
>. 
   </P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN129679"
></A
><H2
>Veja também</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.mysql-query.html"
><B
CLASS="function"
>mysql_query()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysql-num-rows.html"
><B
CLASS="function"
>mysql_num_rows()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysql-fetch-row.html"
><B
CLASS="function"
>mysql_fetch_row()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysql-fetch-assoc.html"
><B
CLASS="function"
>mysql_fetch_assoc()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysql-fetch-array.html"
><B
CLASS="function"
>mysql_fetch_array()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.mysql-fetch-object.html"
><B
CLASS="function"
>mysql_fetch_object()</B
></A
></TD
></TR
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></P
>
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