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>define</H1
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>    (PHP 3, PHP 4 )</P
>define&nbsp;--&nbsp;Defines a named constant.</DIV
><DIV
CLASS="refsect1"
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NAME="AEN55386"
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><H2
>Description</H2
>bool <B
CLASS="methodname"
>define</B
> ( string name, mixed value [, bool case_insensitive])<BR
></BR
><P
>&#13;     Defines a named constant. See the 
     <A
HREF="language.constants.html"
>section on constants</A
>
     for more details.
    </P
><P
>&#13;     The name of the constant is given by <TT
CLASS="parameter"
><I
>name</I
></TT
>;
     the value is given by <TT
CLASS="parameter"
><I
>value</I
></TT
>.
    </P
><P
>&#13;     The optional third parameter
     <TT
CLASS="parameter"
><I
>case_insensitive</I
></TT
> is also available. If the
     value <TT
CLASS="constant"
><B
>TRUE</B
></TT
> is given, then the constant will be
     defined case-insensitive. The default behaviour is
     case-sensitive; i.e. CONSTANT and Constant represent different
     values.
    </P
><P
>&#13;     <TABLE
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><B
>Example 1. Defining Constants</B
></P
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><PRE
CLASS="php"
>&#60;?php
define ("CONSTANT", "Hello world.");
echo CONSTANT; // outputs "Hello world."
echo Constant; // outputs "Constant" and issues a notice.

define ("GREETING", "Hello you.",TRUE);
echo GREETING; // outputs "Hello you."
echo Greeting; // outputs "Hello you."

?&#62;</PRE
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    </P
><P
>&#13;     Returns <TT
CLASS="constant"
><B
>TRUE</B
></TT
> on success or <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on failure.
    </P
><P
>&#13;     See also <A
HREF="function.defined.html"
><B
CLASS="function"
>defined()</B
></A
>,
     <A
HREF="function.constant.html"
><B
CLASS="function"
>constant()</B
></A
> and the section on <A
HREF="language.constants.html"
>Constants</A
>.
    </P
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