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

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>sqlite_udf_decode_binary</H1
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NAME="AEN212023"
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><P
>    (PHP 5)</P
>sqlite_udf_decode_binary&nbsp;--&nbsp;Decodifica dados binários passados como parâmetros para uma UDF.</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN212026"
></A
><H2
>Descrição</H2
>string <B
CLASS="methodname"
>sqlite_udf_decode_binary</B
> ( string data )<BR
></BR
><P
>&#13;   <B
CLASS="function"
>sqlite_udf_decode_binary()</B
> decodifica dados binários que foram codificados
   antes por <A
HREF="function.sqlite-udf-encode-binary.html"
><B
CLASS="function"
>sqlite_udf_encode_binary()</B
></A
> ou
   <A
HREF="function.sqlite-escape-string.html"
><B
CLASS="function"
>sqlite_escape_string()</B
></A
>.
  </P
><P
>&#13;   Você deve usar esta função em parâmetros passados para a sua UDF se você
   precisar usar dados binários, esta função irá retornar os seus dados
   para a sua forma natural, não codificada.
  </P
><P
>&#13;   O PHP não faz esta codificação/decodificação automaticamente já que certamente
   haveria um impacto na performance se ele fizesse.
  </P
><P
>&#13;   <TABLE
WIDTH="100%"
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN212041"
></A
><P
><B
>Exemplo 1. Exemplo de função binary-safe max_length</B
></P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$data </font><font color="#007700">= array(<br />&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'one'</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'two'</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'three'</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'four'</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'five'</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'six'</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'seven'</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'eight'</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'nine'</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;</font><font color="#DD0000">'ten'</font><font color="#007700">,<br />&nbsp;&nbsp;&nbsp;);<br /></font><font color="#0000BB">$db </font><font color="#007700">= </font><font color="#0000BB">sqlite_open</font><font color="#007700">(</font><font color="#DD0000">':memory:'</font><font color="#007700">);<br /></font><font color="#0000BB">sqlite_query</font><font color="#007700">(</font><font color="#0000BB">$db</font><font color="#007700">, </font><font color="#DD0000">"CREATE TABLE strings(a)"</font><font color="#007700">);<br />foreach (</font><font color="#0000BB">$data </font><font color="#007700">as </font><font color="#0000BB">$str</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$str </font><font color="#007700">= </font><font color="#0000BB">sqlite_escape_string</font><font color="#007700">(</font><font color="#0000BB">$str</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">sqlite_query</font><font color="#007700">(</font><font color="#0000BB">$db</font><font color="#007700">, </font><font color="#DD0000">"INSERT INTO strings VALUES ('$str')"</font><font color="#007700">);<br />}<br /><br />function </font><font color="#0000BB">max_len_step</font><font color="#007700">(&amp;</font><font color="#0000BB">$context</font><font color="#007700">, </font><font color="#0000BB">$string</font><font color="#007700">) <br />{<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$string </font><font color="#007700">= </font><font color="#0000BB">sqlite_udf_decode_binary</font><font color="#007700">(</font><font color="#0000BB">$string</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;if (</font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$string</font><font color="#007700">) &gt; </font><font color="#0000BB">$context</font><font color="#007700">) {<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">$context </font><font color="#007700">= </font><font color="#0000BB">strlen</font><font color="#007700">(</font><font color="#0000BB">$string</font><font color="#007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />}<br /><br />function </font><font color="#0000BB">max_len_finalize</font><font color="#007700">(&amp;</font><font color="#0000BB">$context</font><font color="#007700">) <br />{<br />&nbsp;&nbsp;&nbsp;&nbsp;return </font><font color="#0000BB">$context</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">sqlite_create_aggregate</font><font color="#007700">(</font><font color="#0000BB">$db</font><font color="#007700">, </font><font color="#DD0000">'max_len'</font><font color="#007700">, </font><font color="#DD0000">'max_len_step'</font><font color="#007700">, </font><font color="#DD0000">'max_len_finalize'</font><font color="#007700">);<br /><br /></font><font color="#0000BB">var_dump</font><font color="#007700">(</font><font color="#0000BB">sqlite_array_query</font><font color="#007700">(</font><font color="#0000BB">$db</font><font color="#007700">, </font><font color="#DD0000">'SELECT max_len(a) from strings'</font><font color="#007700">));<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
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  </P
><P
>&#13;   Veja também <A
HREF="function.sqlite-udf-encode-binary.html"
><B
CLASS="function"
>sqlite_udf_encode_binary()</B
></A
>,
   <A
HREF="function.sqlite-create-function.html"
><B
CLASS="function"
>sqlite_create_function()</B
></A
> e
   <A
HREF="function.sqlite-create-aggregate.html"
><B
CLASS="function"
>sqlite_create_aggregate()</B
></A
>.
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