php-doc-en/reference/misc/functions/constant.xml
Hartmut Holzgraefe 5b9fc29465 revision tags added
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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.2 $ -->
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<refentry id="function.constant">
<refnamediv>
<refname>constant</refname>
<refpurpose>Returns the value of a constant</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>mixed</type><methodname>constant</methodname>
<methodparam><type>string</type><parameter>name</parameter></methodparam>
</methodsynopsis>
<simpara>
<function>constant</function> will return the value of the
constant indicated by <parameter>name</parameter>.
</simpara>
<simpara>
<function>constant</function> is useful if you need to retrieve
the value of a constant, but do not know it's name. i.e. It is
stored in a variable or returned by a function.
</simpara>
<para>
<example>
<title><function>constant</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
define ("MAXSIZE", 100);
echo MAXSIZE;
echo constant("MAXSIZE"); // same thing as the previous line
?>
]]>
</programlisting>
</example>
</para>
<para>
See also <function>define</function>,
<function>defined</function> and the section on <link
linkend="language.constants">Constants</link>.
</para>
</refsect1>
</refentry>
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