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

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

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>array_slice</H1
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NAME="AEN11559"
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><P
>    (PHP 4, PHP 5)</P
>array_slice&nbsp;--&nbsp;Extrai uma parcela de um array</DIV
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>Descrição</H2
>array <B
CLASS="methodname"
>array_slice</B
> ( array array, int offset [, int length [, bool preserve_keys]] )<BR
></BR
><P
>&#13;     <B
CLASS="function"
>array_slice()</B
> retorna a sequência de elementos
     de <CODE
CLASS="parameter"
>array</CODE
> especificada pelos parâmetros
     <CODE
CLASS="parameter"
>offset</CODE
> e <CODE
CLASS="parameter"
>length</CODE
>.
    </P
><P
>&#13;     Se <CODE
CLASS="parameter"
>offset</CODE
> for não negativo, a sequência
     começará do início de <CODE
CLASS="parameter"
>array</CODE
>.  Se
     <CODE
CLASS="parameter"
>offset</CODE
> for negativo, a sequência
     começará dessa distância do final de <CODE
CLASS="parameter"
>array</CODE
>.
    </P
><P
>&#13;     Se <CODE
CLASS="parameter"
>length</CODE
> for especificado e positivo, então
     a sequência terá essa quantidade de elementos. Se
     <CODE
CLASS="parameter"
>length</CODE
> for especificado e negativo então
     a sequência pará dessa quantidade elementos a partir do final do
     array. Se for omitido, então a sequência terá todos os elementos
     a partir de <CODE
CLASS="parameter"
>offset</CODE
> até o final de
     <CODE
CLASS="parameter"
>array</CODE
>.
    </P
><P
>&#13;     Note que <B
CLASS="function"
>array_slice()</B
> irá reiniciar as chaves
     numericas pr padrão. Desde o PHP 5.0.2, você pode mudar esse funcionamento
     definindo <CODE
CLASS="parameter"
>preserve_keys</CODE
> como <TT
CLASS="constant"
><B
>TRUE</B
></TT
>.
    </P
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><P
><B
>Exemplo 1. Exemplos de <B
CLASS="function"
>array_slice()</B
></B
></P
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><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$input </font><font color="#007700">= array(</font><font color="#DD0000">"a"</font><font color="#007700">, </font><font color="#DD0000">"b"</font><font color="#007700">, </font><font color="#DD0000">"c"</font><font color="#007700">, </font><font color="#DD0000">"d"</font><font color="#007700">, </font><font color="#DD0000">"e"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">$output </font><font color="#007700">= </font><font color="#0000BB">array_slice</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">, </font><font color="#0000BB">2</font><font color="#007700">);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">// retorna "c", "d", e "e"<br /></font><font color="#0000BB">$output </font><font color="#007700">= </font><font color="#0000BB">array_slice</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">, </font><font color="#0000BB">2</font><font color="#007700">, -</font><font color="#0000BB">1</font><font color="#007700">);&nbsp;&nbsp;</font><font color="#FF8000">// retorna "c", "d"<br /></font><font color="#0000BB">$output </font><font color="#007700">= </font><font color="#0000BB">array_slice</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">, -</font><font color="#0000BB">2</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">);&nbsp;&nbsp;</font><font color="#FF8000">// retorna "d"<br /></font><font color="#0000BB">$output </font><font color="#007700">= </font><font color="#0000BB">array_slice</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">, </font><font color="#0000BB">0</font><font color="#007700">, </font><font color="#0000BB">3</font><font color="#007700">);&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">// retorna "a", "b", e "c"<br />// Npote as diferenças nas chaves das arrays<br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">array_slice</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">, </font><font color="#0000BB">2</font><font color="#007700">, -</font><font color="#0000BB">1</font><font color="#007700">));<br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">array_slice</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">, </font><font color="#0000BB">2</font><font color="#007700">, -</font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#0000BB">true</font><font color="#007700">));<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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><P
>O exemplo acima irá imprimir:</P
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><PRE
CLASS="screen"
>Array
(
    [0] =&#62; c
    [1] =&#62; d
)
Array
(
    [2] =&#62; c
    [3] =&#62; d
}</PRE
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>
    </P
><P
>&#13;     Veja também <A
HREF="function.array-splice.html"
><B
CLASS="function"
>array_splice()</B
></A
> e <A
HREF="function.unset.html"
><B
CLASS="function"
>unset()</B
></A
>.
    </P
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