<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >is_resource</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_real" HREF="function.is-real.html"><LINK REL="NEXT" TITLE="is_scalar" HREF="function.is-scalar.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-real.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-scalar.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.is-resource" ></A >is_resource</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN230126" ></A ><P > (PHP 4, PHP 5)</P >is_resource -- Informa se a variável é um resource </DIV ><DIV CLASS="refsect1" ><A NAME="AEN230129" ></A ><H2 >Descrição</H2 >bool <B CLASS="methodname" >is_resource</B > ( mixed var )<BR ></BR ><P > <B CLASS="function" >is_resource()</B > Retorna <TT CLASS="constant" ><B >TRUE</B ></TT > se a variável <CODE CLASS="parameter" >var</CODE > é do tipo <A HREF="language.types.resource.html" ><B CLASS="type" >resource</B ></A >, <TT CLASS="constant" ><B >FALSE</B ></TT > senão. </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN230144" ></A ><P ><B >Exemplo 1. Usando <B CLASS="function" >is_resource()</B ></B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /><br />$db_link </font><font color="#007700">= @</font><font color="#0000BB">mysql_connect</font><font color="#007700">(</font><font color="#DD0000">'localhost'</font><font color="#007700">, </font><font color="#DD0000">'mysql_user'</font><font color="#007700">, </font><font color="#DD0000">'mysql_pass'</font><font color="#007700">);<br />if (!</font><font color="#0000BB">is_resource</font><font color="#007700">(</font><font color="#0000BB">$db_link</font><font color="#007700">)) {<br /> die(</font><font color="#DD0000">'Can\'t connect : ' </font><font color="#007700">. </font><font color="#0000BB">mysql_error</font><font color="#007700">());<br />}<br /><br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > Veja a documentação sobre o tipo <A HREF="language.types.resource.html" ><B CLASS="type" >resource</B ></A >para maiores informações. </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-real.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-scalar.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >is_real</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_scalar</TD ></TR ></TABLE ></DIV ></BODY ></HTML >