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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>property_exists</H1
><DIV
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><A
NAME="AEN15851"
></A
><P
>    (PHP 5 &#62;= 5.1.0RC1)</P
>property_exists&nbsp;--&nbsp;
   Checa se o objeto ou a classe tem uma propriedade
  </DIV
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CLASS="refsect1"
><A
NAME="AEN15854"
></A
><H2
>Descrição</H2
>bool <B
CLASS="methodname"
>property_exists</B
> ( mixed class, string property )<BR
></BR
><P
>&#13;   Essa função checa se <CODE
CLASS="parameter"
>property</CODE
> existe na
   classe especificada (e se foi declarada como pública).
  </P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>Nota: </B
>
    Ao contrário de <A
HREF="function.isset.html"
><B
CLASS="function"
>isset()</B
></A
>,
    <B
CLASS="function"
>property_exists()</B
> retorna <TT
CLASS="constant"
><B
>TRUE</B
></TT
> mesmo se a propriedade
    tiver valor <TT
CLASS="constant"
><B
>NULL</B
></TT
> (nulo).
   </P
></BLOCKQUOTE
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><DIV
CLASS="refsect1"
><A
NAME="AEN15873"
></A
><H2
>Parâmetros</H2
><P
>&#13;   <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>class</CODE
></DT
><DD
><P
>&#13;        Uma string com o nome da classe ou um objeto da classe à ser testado
       </P
></DD
><DT
><CODE
CLASS="parameter"
>property</CODE
></DT
><DD
><P
>&#13;        O nome da propriedade
       </P
></DD
></DL
></DIV
>
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN15887"
></A
><H2
>Valores de retornado</H2
><P
>&#13;   Retorna <TT
CLASS="constant"
><B
>TRUE</B
></TT
> se a propriedade existe, <TT
CLASS="constant"
><B
>FALSE</B
></TT
> se ela não existir ou
   <TT
CLASS="constant"
><B
>NULL</B
></TT
> em caso de erro.
  </P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN15893"
></A
><H2
>Exemplos</H2
><P
>&#13;   <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN15896"
></A
><P
><B
>Exemplo 1. Um exemplo de <B
CLASS="function"
>property_exists()</B
></B
></P
><TABLE
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><TD
><code><font color="#000000">
<font color="#0000BB">&lt;?php<br /><br /></font><font color="#007700">class </font><font color="#0000BB">myClass </font><font color="#007700">{<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">public $mine</font><font color="#007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;</font><font color="#0000BB">private $xpto</font><font color="#007700">;<br />}<br /><br /></font><font color="#0000BB">var_dump</font><font color="#007700">(</font><font color="#0000BB">property_exists</font><font color="#007700">(</font><font color="#DD0000">'myClass'</font><font color="#007700">, </font><font color="#DD0000">'mine'</font><font color="#007700">));&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">//true<br /></font><font color="#0000BB">var_dump</font><font color="#007700">(</font><font color="#0000BB">property_exists</font><font color="#007700">(new </font><font color="#0000BB">myClass</font><font color="#007700">, </font><font color="#DD0000">'mine'</font><font color="#007700">)); </font><font color="#FF8000">//true<br /></font><font color="#0000BB">var_dump</font><font color="#007700">(</font><font color="#0000BB">property_exists</font><font color="#007700">(</font><font color="#DD0000">'myClass'</font><font color="#007700">, </font><font color="#DD0000">'xpto'</font><font color="#007700">));&nbsp;&nbsp;&nbsp;</font><font color="#FF8000">//false, isn't public<br /><br /></font><font color="#0000BB">?&gt;</font>
</font>
</code></TD
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>
  </P
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><DIV
CLASS="refsect1"
><A
NAME="AEN15900"
></A
><H2
>Veja também</H2
><P
>&#13;   <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.method-exists.html"
><B
CLASS="function"
>method_exists()</B
></A
></TD
></TR
></TBODY
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><P
></P
>
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