1<documentation title="Lowercase Class Keywords"> 2 <standard> 3 <![CDATA[ 4 The php keywords class, interface, trait, extends, implements, abstract, final, var, and const should be lowercase. 5 ]]> 6 </standard> 7 <code_comparison> 8 <code title="Valid: Lowercase class keywords."> 9 <![CDATA[ 10<em>final</em> <em>class</em> Foo <em>extends</em> Bar 11{ 12} 13]]> 14 </code> 15 <code title="Invalid: Initial capitalization of class keywords."> 16 <![CDATA[ 17<em>Final</em> <em>Class</em> Foo <em>Extends</em> Bar 18{ 19} 20]]> 21 </code> 22 </code_comparison> 23</documentation> 24