Sophie

Sophie

distrib > Mandriva > 2008.1 > i586 > by-pkgid > 703d980c580707c382b4e43e25965bc5 > files > 5657

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

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>count</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK
REL="HOME"
TITLE="Manual do PHP"
HREF="index.html"><LINK
REL="UP"
TITLE="Arrays"
HREF="ref.array.html"><LINK
REL="PREVIOUS"
TITLE="compact"
HREF="function.compact.html"><LINK
REL="NEXT"
TITLE="current"
HREF="function.current.html"><META
HTTP-EQUIV="Content-type"
CONTENT="text/html; charset=UTF-8"></HEAD
><BODY
CLASS="refentry"
BGCOLOR="#FFFFFF"
TEXT="#000000"
LINK="#0000FF"
VLINK="#840084"
ALINK="#0000FF"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>Manual do PHP</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="function.compact.html"
ACCESSKEY="P"
>Anterior</A
></TD
><TD
WIDTH="80%"
ALIGN="center"
VALIGN="bottom"
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="bottom"
><A
HREF="function.current.html"
ACCESSKEY="N"
>Próxima</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="function.count"
></A
>count</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN12343"
></A
><P
>    (PHP 3, PHP 4, PHP 5)</P
>count&nbsp;--&nbsp;Conta o número de elementos de uma variável</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN12346"
></A
><H2
>Descrição</H2
>int <B
CLASS="methodname"
>count</B
> ( mixed var [, int mode] )<BR
></BR
><P
>&#13;     Retorna o número de elementos de <CODE
CLASS="parameter"
>var</CODE
>,
     que normalmente é um <A
HREF="language.types.array.html"
><B
CLASS="type"
>array</B
></A
> (uma vez que qualquer outra coisa
     terá apenas um elemento).
    </P
><P
>&#13;     Se <CODE
CLASS="parameter"
>var</CODE
> não for um array, <TT
CLASS="literal"
>1</TT
> será
     retornado (excessão: <TT
CLASS="literal"
>count(<TT
CLASS="constant"
><B
>NULL</B
></TT
>)</TT
> retorna 
     <TT
CLASS="literal"
>0</TT
>).
    </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>
      O parâmetro opcional <CODE
CLASS="parameter"
>mode</CODE
> esta disponível apartir
      do PHP 4.2.0.
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     Se o parâmetro opcional <CODE
CLASS="parameter"
>mode</CODE
> for
     <TT
CLASS="constant"
><B
>COUNT_RECURSIVE</B
></TT
> (ou 1), a função <B
CLASS="function"
>count()</B
>
     irá recursivamente contar a matriz. Isto é particularmente util
     para contar elementos em matriz multidimensional.
     O valor padrão para <CODE
CLASS="parameter"
>mode</CODE
> é <TT
CLASS="literal"
>0</TT
>.
    </P
><DIV
CLASS="caution"
><P
></P
><TABLE
CLASS="caution"
BORDER="1"
WIDTH="100%"
><TR
><TD
ALIGN="CENTER"
><B
>Cuidado</B
></TD
></TR
><TR
><TD
ALIGN="LEFT"
><P
>&#13;      <B
CLASS="function"
>count()</B
> pode retornar 0 para uma variável
      que não existe, mas também pode retornar 0 para uma variável que tenha
      sido inicializada como um array vazio. Use
      <A
HREF="function.isset.html"
><B
CLASS="function"
>isset()</B
></A
> para checar se a variável existe.
     </P
></TD
></TR
></TABLE
></DIV
><P
>&#13;     Por favor, veja a sessão <A
HREF="language.types.array.html"
>Arrays</A
>
     do manual para uma explicação mais detalhada sobre como os arrays são
     implementados e utilizados no PHP.
    </P
><P
>&#13;     <TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN12382"
></A
><P
><B
>Exemplo 1. Exemplo de <B
CLASS="function"
>count()</B
></B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$a</font><font color="#007700">[</font><font color="#0000BB">0</font><font color="#007700">] = </font><font color="#0000BB">1</font><font color="#007700">; <br /></font><font color="#0000BB">$a</font><font color="#007700">[</font><font color="#0000BB">1</font><font color="#007700">] = </font><font color="#0000BB">3</font><font color="#007700">; <br /></font><font color="#0000BB">$a</font><font color="#007700">[</font><font color="#0000BB">2</font><font color="#007700">] = </font><font color="#0000BB">5</font><font color="#007700">; <br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">count</font><font color="#007700">(</font><font color="#0000BB">$a</font><font color="#007700">);<br /></font><font color="#FF8000">// $result == 3<br /><br /></font><font color="#0000BB">$b</font><font color="#007700">[</font><font color="#0000BB">0</font><font color="#007700">] = </font><font color="#0000BB">7</font><font color="#007700">;<br /></font><font color="#0000BB">$b</font><font color="#007700">[</font><font color="#0000BB">5</font><font color="#007700">] = </font><font color="#0000BB">9</font><font color="#007700">;<br /></font><font color="#0000BB">$b</font><font color="#007700">[</font><font color="#0000BB">10</font><font color="#007700">] = </font><font color="#0000BB">11</font><font color="#007700">;<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">count</font><font color="#007700">(</font><font color="#0000BB">$b</font><font color="#007700">);<br /></font><font color="#FF8000">// $result == 3;<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
    </P
><TABLE
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN12386"
></A
><P
><B
>Exemplo 2. 
      Uso recursivo da função <B
CLASS="function"
>count()</B
> (PHP &#62;= 4.2.0)
     </B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br />$food </font><font color="#007700">= array( </font><font color="#DD0000">'fruits'&nbsp;&nbsp;</font><font color="#007700">=&gt; array(</font><font color="#DD0000">'orange'</font><font color="#007700">, </font><font color="#DD0000">'banana'</font><font color="#007700">, </font><font color="#DD0000">'apple'</font><font color="#007700">),<br /></font><font color="#DD0000">'veggie'&nbsp;&nbsp;</font><font color="#007700">=&gt; array(</font><font color="#DD0000">'carrot'</font><font color="#007700">, </font><font color="#DD0000">'collard'</font><font color="#007700">,</font><font color="#DD0000">'pea'</font><font color="#007700">));<br /></font><font color="#FF8000">// recursive count<br /></font><font color="#007700">echo </font><font color="#0000BB">count</font><font color="#007700">(</font><font color="#0000BB">$food</font><font color="#007700">,</font><font color="#0000BB">COUNT_RECURSIVE</font><font color="#007700">);&nbsp;&nbsp;</font><font color="#FF8000">// mostra 8<br />// normal count<br /></font><font color="#007700">echo </font><font color="#0000BB">count</font><font color="#007700">(</font><font color="#0000BB">$food</font><font color="#007700">);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">// mostra2 2<br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>
      A função <A
HREF="function.sizeof.html"
><B
CLASS="function"
>sizeof()</B
></A
> é um <A
HREF="aliases.html"
>alias</A
> para
      <B
CLASS="function"
>count()</B
>.
     </P
></BLOCKQUOTE
></DIV
><P
>&#13;     Veja também <A
HREF="function.is-array.html"
><B
CLASS="function"
>is_array()</B
></A
>,
     <A
HREF="function.isset.html"
><B
CLASS="function"
>isset()</B
></A
> e 
     <A
HREF="function.strlen.html"
><B
CLASS="function"
>strlen()</B
></A
>.
    </P
></DIV
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
SUMMARY="Footer navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><A
HREF="function.compact.html"
ACCESSKEY="P"
>Anterior</A
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="index.html"
ACCESSKEY="H"
>Principal</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><A
HREF="function.current.html"
ACCESSKEY="N"
>Próxima</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
>compact</TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="ref.array.html"
ACCESSKEY="U"
>Acima</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
>current</TD
></TR
></TABLE
></DIV
></BODY
></HTML
>

Perl :: Catalyst :: PostgreSQL :: RPM Valid HTML 4.01 Transitional