<documentation title="Constant Names">
<standard>
<![CDATA[
Constants should always be all-uppercase, with underscores to separate words.
]]>
</standard>
<code_comparison>
<code title="Valid: all uppercase">
<![CDATA[
define('<em>FOO_CONSTANT</em>', 'foo');
class FooClass
{
const <em>FOO_CONSTANT</em> = 'foo';
}
]]>
</code>
<code title="Invalid: mixed case">
<![CDATA[
define('<em>Foo_Constant</em>', 'foo');
class FooClass
{
const <em>foo_constant</em> = 'foo';
}
]]>
</code>
</code_comparison>
</documentation>