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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 288721 $ -->
<sect1 xml:id="control-structures.else" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<title><literal>else</literal></title>
<para>
Often you'd want to execute a statement if a certain condition is
met, and a different statement if the condition is not met. This
is what <literal>else</literal> is for. <literal>else</literal>
extends an <literal>if</literal> statement to execute a statement
in case the expression in the <literal>if</literal> statement
evaluates to &false;. For example, the following
code would display <computeroutput>a is greater than
b</computeroutput> if <varname>$a</varname> is greater than
<varname>$b</varname>, and <computeroutput>a is NOT greater
than b</computeroutput> otherwise:
<informalexample>
<programlisting role="php">
<![CDATA[
<?php
if ($a > $b) {
echo "a is greater than b";
} else {
echo "a is NOT greater than b";
}
?>
]]>
</programlisting>
</informalexample>
The <literal>else</literal> statement is only executed if the
<literal>if</literal> expression evaluated to
&false;, and if there were any
<literal>elseif</literal> expressions - only if they evaluated to
&false; as well (see <link
linkend="control-structures.elseif">elseif</link>).
</para>
</sect1>
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