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

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><H1
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>each</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN12433"
></A
><P
>    (PHP 3, PHP 4, PHP 5)</P
>each&nbsp;--&nbsp;
     Retorna o par chave/valor corrente de um array e avança o seu cursor
    </DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN12436"
></A
><H2
>Descrição</H2
>array <B
CLASS="methodname"
>each</B
> ( array array )<BR
></BR
><P
>&#13;     Retorna o par chave/valor corrente de
     <CODE
CLASS="parameter"
>array</CODE
> e avança o seu cursor. Esse
     par é retornado num array de quatro elementos, com as chaves
     <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>0</I
></SPAN
>, <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>1</I
></SPAN
>,
     <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>key</I
></SPAN
>, e
     <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>value</I
></SPAN
>. Os elementos <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>0</I
></SPAN
> e
     <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>key</I
></SPAN
> contêm o nome da chave do elemento do array, e
     <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>1</I
></SPAN
> e <SPAN
CLASS="emphasis"
><I
CLASS="emphasis"
>value</I
></SPAN
> contêm o valor.
    </P
><P
>&#13;     Se o cursor interno do array estiver apontando para além do final do
     array, <B
CLASS="function"
>each()</B
> retorna <TT
CLASS="constant"
><B
>FALSE</B
></TT
>.
    </P
><P
>&#13;     <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN12458"
></A
><P
><B
>Exemplo 1. Exemplos de <B
CLASS="function"
>each()</B
></B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br />$foo </font><font color="#007700">= array(</font><font color="#DD0000">"bob"</font><font color="#007700">, </font><font color="#DD0000">"fred"</font><font color="#007700">, </font><font color="#DD0000">"jussi"</font><font color="#007700">, </font><font color="#DD0000">"jouni"</font><font color="#007700">, </font><font color="#DD0000">"egon"</font><font color="#007700">, </font><font color="#DD0000">"marliese"</font><font color="#007700">); <br /></font><font color="#0000BB">$bar </font><font color="#007700">= </font><font color="#0000BB">each</font><font color="#007700">(</font><font color="#0000BB">$foo</font><font color="#007700">);<br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">$bar</font><font color="#007700">); <br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>&#13;       <CODE
CLASS="varname"
>$bar</CODE
> agora contém os seguintes pares de chaves e
       valores:
       </P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>Array  
  (  
      [1] =&#62; bob  
      [value] =&#62; bob  
      [0] =&#62; 0  
      [key] =&#62; 0  
  )</PRE
></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
> 
      </P
><P
>  
       <DIV
CLASS="informalexample"
><P
></P
><A
NAME="AEN12466"
></A
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php  <br />&nbsp;&nbsp;$foo </font><font color="#007700">= array(</font><font color="#DD0000">"Robert" </font><font color="#007700">=&gt; </font><font color="#DD0000">"Bob"</font><font color="#007700">, </font><font color="#DD0000">"Seppo" </font><font color="#007700">=&gt; </font><font color="#DD0000">"Sepi"</font><font color="#007700">);&nbsp;&nbsp;<br />&nbsp;&nbsp;</font><font color="#0000BB">$bar </font><font color="#007700">= </font><font color="#0000BB">each</font><font color="#007700">(</font><font color="#0000BB">$foo</font><font color="#007700">);&nbsp;&nbsp;<br />&nbsp;&nbsp;</font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">$bar</font><font color="#007700">);&nbsp;&nbsp;<br />&nbsp;&nbsp;</font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
><P
>&#13;       <CODE
CLASS="varname"
>$bar</CODE
> agora contém os seguintes pares de chaves e
       valores:
       
      </P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>Array  
  (  
      [1] =&#62; Bob  
      [value] =&#62; Bob  
      [0] =&#62; Robert  
      [key] =&#62; Robert  
  )</PRE
></TD
></TR
></TABLE
><P
></P
></DIV
>  
    </P
><P
>&#13;     <B
CLASS="function"
>each()</B
> é tipicamente usada em conjunto com
     <A
HREF="function.list.html"
><B
CLASS="function"
>list()</B
></A
> para percorrer um array, por exemplo:
     <TABLE
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CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN12474"
></A
><P
><B
>Exemplo 2.  Percorrendo um array com
       <B
CLASS="function"
>each()</B
></B
></P
><TABLE
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BGCOLOR="#E0E0E0"
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php <br />$fruit </font><font color="#007700">= array(</font><font color="#DD0000">'a' </font><font color="#007700">=&gt; </font><font color="#DD0000">'apple'</font><font color="#007700">, </font><font color="#DD0000">'b' </font><font color="#007700">=&gt; </font><font color="#DD0000">'banana'</font><font color="#007700">, </font><font color="#DD0000">'c' </font><font color="#007700">=&gt; </font><font color="#DD0000">'cranberry'</font><font color="#007700">); <br /></font><font color="#0000BB">reset</font><font color="#007700">(</font><font color="#0000BB">$fruit</font><font color="#007700">); <br />while (list(</font><font color="#0000BB">$key</font><font color="#007700">, </font><font color="#0000BB">$val</font><font color="#007700">) = </font><font color="#0000BB">each</font><font color="#007700">(</font><font color="#0000BB">$fruit</font><font color="#007700">)) {&nbsp;&nbsp;<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo </font><font color="#DD0000">"$key =&gt; $val</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;&nbsp;&nbsp;<br />}<br /></font><font color="#FF8000">/* Saída: <br />&nbsp;&nbsp;&nbsp;&nbsp;<br />&nbsp;&nbsp;a =&gt; apple <br />&nbsp;&nbsp;b =&gt; banana <br />&nbsp;&nbsp;c =&gt; cranberry <br />&nbsp;&nbsp;&nbsp;&nbsp;<br />&nbsp;&nbsp;*/ <br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
    </P
><P
>&#13;     Depois da execução de <B
CLASS="function"
>each()</B
>, o cursor interno do
     array vai apontar para o próximo elemento do array, ou após o último
     elemento se ele chegar ao final do array. Você deve usar 
     <A
HREF="function.reset.html"
><B
CLASS="function"
>reset()</B
></A
> se quiser percorrer o array novamente.
    </P
><DIV
CLASS="caution"
><P
></P
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ALIGN="CENTER"
><B
>Cuidado</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
> 
        Because assigning an array to another variable resets the original 
        arrays pointer, our example above would cause an endless loop had we 
        assigned <CODE
CLASS="varname"
>$fruit</CODE
> to another variable inside the 
        loop. 
       </P
></TD
></TR
></TABLE
></DIV
><P
>&#13;     Veja também <A
HREF="function.key.html"
><B
CLASS="function"
>key()</B
></A
>, <A
HREF="function.list.html"
><B
CLASS="function"
>list()</B
></A
>,
     <A
HREF="function.current.html"
><B
CLASS="function"
>current()</B
></A
>, <A
HREF="function.reset.html"
><B
CLASS="function"
>reset()</B
></A
>,
     <A
HREF="function.next.html"
><B
CLASS="function"
>next()</B
></A
>, <A
HREF="function.prev.html"
><B
CLASS="function"
>prev()</B
></A
> e 
     <A
HREF="control-structures.foreach.html"
>foreach</A
>.
    </P
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