<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >array_unique</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="array_uintersect" HREF="function.array-uintersect.html"><LINK REL="NEXT" TITLE="array_unshift" HREF="function.array-unshift.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.array-uintersect.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.array-unshift.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.array-unique" ></A >array_unique</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN11987" ></A ><P > (PHP 4 >= 4.0.1, PHP 5)</P >array_unique -- Remove o valores duplicados de um array</DIV ><DIV CLASS="refsect1" ><A NAME="AEN11990" ></A ><H2 >Descrição</H2 >array <B CLASS="methodname" >array_unique</B > ( array array )<BR ></BR ><P > <B CLASS="function" >array_unique()</B > recebe o argumento <CODE CLASS="parameter" >array</CODE > e retorna um novo array sem valores duplicados. </P ><P > Note que as chaves são preservadas. <B CLASS="function" >array_unique()</B > ordena inicialmente os valores como strings mantendo a primeira chave encontrada para cada valor, e ignorando as chaves encontradas posteriormente. Isso não significa que a chave do primeiro valor do <CODE CLASS="parameter" >array</CODE > ainda desordenado será mantido. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Nota: </B > Dois elementos são considerados iguais se, e somente se, <TT CLASS="literal" >(string) $elem1 === (string) $elem2</TT >. Em palavras: quando a represetação em string é a mesma. </P ><P > O primeiro será usado. </P ></BLOCKQUOTE ></DIV ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN12009" ></A ><P ><B >Exemplo 1. Exemplo de <B CLASS="function" >array_unique()</B ></B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$input </font><font color="#007700">= array(</font><font color="#DD0000">"a" </font><font color="#007700">=> </font><font color="#DD0000">"verde"</font><font color="#007700">, </font><font color="#DD0000">"vermelho"</font><font color="#007700">, </font><font color="#DD0000">"b" </font><font color="#007700">=> </font><font color="#DD0000">"verde"</font><font color="#007700">, </font><font color="#DD0000">"azul"</font><font color="#007700">, </font><font color="#DD0000">"vermelho"</font><font color="#007700">);<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">array_unique</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">);<br /></font><font color="#0000BB">print_r</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P > A saída seria: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> Array<br />(<br /> [a] => verde<br /> [1] => azul<br /> [2] => vermelho<br />)</font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN12016" ></A ><P ><B >Exemplo 2. <B CLASS="function" >array_unique()</B > e tipos</B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />$input </font><font color="#007700">= array(</font><font color="#0000BB">4</font><font color="#007700">, </font><font color="#DD0000">"4"</font><font color="#007700">, </font><font color="#DD0000">"3"</font><font color="#007700">, </font><font color="#0000BB">4</font><font color="#007700">, </font><font color="#0000BB">3</font><font color="#007700">, </font><font color="#DD0000">"3"</font><font color="#007700">);<br /></font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">array_unique</font><font color="#007700">(</font><font color="#0000BB">$input</font><font color="#007700">);<br /></font><font color="#0000BB">var_dump</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P > A saída do programa acima seria: </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> array(2) {<br /> [0] => int(4)<br /> [2] => string(1) "3"<br />}</font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </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.array-uintersect.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.array-unshift.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >array_uintersect</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" >array_unshift</TD ></TR ></TABLE ></DIV ></BODY ></HTML >