<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >is_scalar</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="Variáveis, Funções" HREF="ref.variables.html"><LINK REL="PREVIOUS" TITLE="is_resource" HREF="function.is-resource.html"><LINK REL="NEXT" TITLE="is_string" HREF="function.is-string.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.is-resource.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.is-string.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.is-scalar" ></A >is_scalar</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN230151" ></A ><P > (PHP 4 >= 4.0.5, PHP 5)</P >is_scalar -- Informa se é uma váriavel escalar </DIV ><DIV CLASS="refsect1" ><A NAME="AEN230154" ></A ><H2 >Descrição</H2 >bool <B CLASS="methodname" >is_scalar</B > ( mixed var )<BR ></BR ><P > <B CLASS="function" >is_scalar()</B > retorna <TT CLASS="constant" ><B >TRUE</B ></TT > se a variável <CODE CLASS="parameter" >var</CODE > for escalar, <TT CLASS="constant" ><B >FALSE</B ></TT > senão. </P ><P > Variáveis escalares são as que contém <A HREF="language.types.integer.html" ><B CLASS="type" >integer</B ></A >, <A HREF="language.types.float.html" ><B CLASS="type" >float</B ></A >, <A HREF="language.types.string.html" ><B CLASS="type" >string</B ></A > ou <A HREF="language.types.boolean.html" ><B CLASS="type" >boolean</B ></A >. os tipos <A HREF="language.types.array.html" ><B CLASS="type" >array</B ></A >, <A HREF="language.types.object.html" ><B CLASS="type" >object</B ></A > e <A HREF="language.types.resource.html" ><B CLASS="type" >resource</B ></A > não são escalares. <DIV CLASS="informalexample" ><P ></P ><A NAME="AEN230175" ></A ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /></font><font color="#007700">function </font><font color="#0000BB">show_var</font><font color="#007700">(</font><font color="#0000BB">$var</font><font color="#007700">) {<br /> if (</font><font color="#0000BB">is_scalar</font><font color="#007700">(</font><font color="#0000BB">$var</font><font color="#007700">)) {<br /> echo </font><font color="#0000BB">$var</font><font color="#007700">;<br /> } else {<br /> </font><font color="#0000BB">var_dump</font><font color="#007700">(</font><font color="#0000BB">$var</font><font color="#007700">);<br /> }<br />}<br /></font><font color="#0000BB">$pi </font><font color="#007700">= </font><font color="#0000BB">3.1416</font><font color="#007700">;<br /></font><font color="#0000BB">$proteins </font><font color="#007700">= array(</font><font color="#DD0000">"hemoglobin"</font><font color="#007700">, </font><font color="#DD0000">"cytochrome c oxidase"</font><font color="#007700">, </font><font color="#DD0000">"ferredoxin"</font><font color="#007700">);<br /><br /></font><font color="#0000BB">show_var</font><font color="#007700">(</font><font color="#0000BB">$pi</font><font color="#007700">);<br /></font><font color="#FF8000">// prints: 3.1416<br /><br /></font><font color="#0000BB">show_var</font><font color="#007700">(</font><font color="#0000BB">$proteins</font><font color="#007700">)<br /></font><font color="#FF8000">// prints:<br />// array(3) {<br />// [0]=><br />// string(10) "hemoglobin"<br />// [1]=><br />// string(20) "cytochrome c oxidase"<br />// [2]=><br />// string(10) "ferredoxin"<br />// }<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ><P ></P ></DIV > </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Nota: </B > <B CLASS="function" >is_scalar()</B > não considera o tipo <A HREF="language.types.resource.html" ><B CLASS="type" >resource</B ></A > como um valor escalar, apesar de tipos resouce ser uma abstração de dados, atualmente baseados em inteiros. Esse detalhe de implementação poderá ser modificado futuramente. </P ></BLOCKQUOTE ></DIV ><P > Veja mais em <A HREF="function.is-bool.html" ><B CLASS="function" >is_bool()</B ></A >, <A HREF="function.is-numeric.html" ><B CLASS="function" >is_numeric()</B ></A >, <A HREF="function.is-float.html" ><B CLASS="function" >is_float()</B ></A >, <A HREF="function.is-int.html" ><B CLASS="function" >is_int()</B ></A >, <A HREF="function.is-real.html" ><B CLASS="function" >is_real()</B ></A >, <A HREF="function.is-string.html" ><B CLASS="function" >is_string()</B ></A >, <A HREF="function.is-object.html" ><B CLASS="function" >is_object()</B ></A >, <A HREF="function.is-array.html" ><B CLASS="function" >is_array()</B ></A > e <A HREF="function.is-integer.html" ><B CLASS="function" >is_integer()</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.is-resource.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.is-string.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >is_resource</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.variables.html" ACCESSKEY="U" >Acima</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >is_string</TD ></TR ></TABLE ></DIV ></BODY ></HTML >