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archived-doc-pt-br/reference/array/functions/array-unique.xml
T
Hartmut Holzgraefe 838ad09c58 banana-split
git-svn-id: https://svn.php.net/repository/phpdoc/pt_BR/trunk@78218 c90b9560-bf6c-de11-be94-00142212c4b1
2002-04-15 01:41:25 +00:00

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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- splitted from ./pt_BR/functions/array.xml, last change in rev 1.1 -->
<!-- last change to 'array-unique' in en/ tree in rev 1.2 -->
<refentry id="function.array-unique">
<refnamediv>
<refname>array_unique</refname>
<refpurpose>Remove o valores duplicados de um array</refpurpose>
</refnamediv>
<refsect1>
<title>Descri&ccedil;&atilde;o</title>
<methodsynopsis>
<type>array</type><methodname>array_unique</methodname>
<methodparam><type>array</type><parameter>array</parameter></methodparam>
</methodsynopsis>
<para>
<function>array_unique</function> recebe o argumento
<parameter>array</parameter> e retorna um novo array sem valores
duplicados.
</para>
<para>
Note que as chaves s&atilde;o preservadas. <function>array_unique</function> ir&aacute;
manter a primeira chave encontrada para cada valor, e ignorar
as chaves posteriores.
</para>
<note>
<simpara>
Dois elementos s&atilde;o considerados iguais se, e somente se,
<literal>(string) $elem1 === (string) $elem2</literal>. Em palavras:
quando a represeta&ccedil;&atilde;o em string &eacute; a mesma.
<!-- TODO: example of it... -->
</simpara>
<simpara>
O primeiro ser&aacute; usado.
</simpara>
</note>
<warning>
<simpara>
Essa fun&ccedil;&atilde;o n&atilde;o funcionava no PHP 4.0.4!
<!-- TODO: when exactly was this broken?... -->
</simpara>
</warning>
<para>
<example>
<title>Exemplo de <function>array_unique</function></title>
<programlisting role="php">
<![CDATA[
$input = array ("a" => "verde", "vermelho", "b" => "verde", "azul", "vermelho");
$result = array_unique ($input);
print_r($result);
// a sa&iacute;da ser&aacute; :
//Array
//(
// [a] => verde
// [0] => vermelho
// [1] => azul
//)
]]>
</programlisting>
</example>
</para>
<para>
<example>
<title><function>array_unique</function> e tipos</title>
<programlisting role="php">
<![CDATA[
$input = array (4,"4","3",4,3,"3");
$result = array_unique ($input);
var_dump($result);
/* sa&iacute;da:
array(2) {
[0]=>
int(4)
[1]=>
string(1) "3"
}
*/
]]>
</programlisting>
</example>
</para>
</refsect1>
</refentry>
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