<HTML ><HEAD ><TITLE >Booleans</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="PHP Manual" HREF="index.html"><LINK REL="UP" TITLE="Creating Variables" HREF="zend.variables.html"><LINK REL="PREVIOUS" TITLE="Strings" HREF="zend.variables.string.html"><LINK REL="NEXT" TITLE="Arrays" HREF="zend.variables.array.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=ISO-8859-1"></HEAD ><BODY CLASS="section" 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" >PHP Manual</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="zend.variables.string.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 33. Creating Variables</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="zend.variables.array.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="section" ><H1 CLASS="section" ><A NAME="zend.variables.boolean" ></A >Booleans</H1 ><P > Booleans are created just like longs, but have the type <TT CLASS="literal" >IS_BOOL</TT >. Allowed values in <TT CLASS="envar" >lval</TT > are <TT CLASS="literal" >0</TT > and <TT CLASS="literal" >1</TT >: <TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><PRE CLASS="programlisting" >zval *new_bool; MAKE_STD_ZVAL(new_bool); new_bool->type = IS_BOOL; new_bool->value.lval = 1;</PRE ></TD ></TR ></TABLE > The corresponding macros for this type are <TT CLASS="literal" >ZVAL_BOOL</TT > (allowing specification of the value) as well as <TT CLASS="literal" >ZVAL_TRUE</TT > and <TT CLASS="literal" >ZVAL_FALSE</TT > (which explicitly set the value to <TT CLASS="literal" >TRUE</TT > and <TT CLASS="literal" >FALSE</TT >, respectively). </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="zend.variables.string.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="zend.variables.array.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Strings</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="zend.variables.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Arrays</TD ></TR ></TABLE ></DIV ></BODY ></HTML >