<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >bcsub</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="BCMath Funções Matemáticas de Precisão Arbitrária" HREF="ref.bc.html"><LINK REL="PREVIOUS" TITLE="bcsqrt" HREF="function.bcsqrt.html"><LINK REL="NEXT" TITLE="Compilador de PHP bytecode" HREF="ref.bcompiler.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.bcsqrt.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="ref.bcompiler.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.bcsub" ></A >bcsub</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN13796" ></A ><P > (PHP 3, PHP 4, PHP 5)</P >bcsub -- Subtrair um número de precisão arbitrária de outro </DIV ><DIV CLASS="refsect1" ><A NAME="AEN13799" ></A ><H2 >Descrição</H2 >string <B CLASS="methodname" >bcsub</B > ( string operador_da_esquerda, string operador_da_direita [, int escala] )<BR ></BR ><P > Subtrair o <CODE CLASS="parameter" >operador_da_direita</CODE > do <CODE CLASS="parameter" >operador_da_esquerda</CODE > e retorna o resultado em uma string. O parametro opcional <CODE CLASS="parameter" >escala</CODE > é usado para configurar o número de digitos depois do ponto decimal que serão mostrados no resultado. </P ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN13818" ></A ><P ><B >Exemplo 1. Exemplo de <B CLASS="function" >bcsub()</B ></B ></P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br /><br />$a </font><font color="#007700">= </font><font color="#0000BB">1.234</font><font color="#007700">;<br /></font><font color="#0000BB">$b </font><font color="#007700">= </font><font color="#0000BB">5</font><font color="#007700">;<br /><br />echo </font><font color="#0000BB">bcsub</font><font color="#007700">(</font><font color="#0000BB">$a</font><font color="#007700">, </font><font color="#0000BB">$b</font><font color="#007700">); </font><font color="#FF8000">// -3<br /></font><font color="#007700">echo </font><font color="#0000BB">bcsub</font><font color="#007700">(</font><font color="#0000BB">$a</font><font color="#007700">, </font><font color="#0000BB">$b</font><font color="#007700">, </font><font color="#0000BB">4</font><font color="#007700">); </font><font color="#FF8000">// -3.7660<br /><br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ><P > Veja também <A HREF="function.bcadd.html" ><B CLASS="function" >bcadd()</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.bcsqrt.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="ref.bcompiler.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >bcsqrt</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.bc.html" ACCESSKEY="U" >Acima</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Compilador de PHP bytecode</TD ></TR ></TABLE ></DIV ></BODY ></HTML >