1<documentation title="Lowercase Function Keywords"> 2 <standard> 3 <![CDATA[ 4 The php keywords function, public, private, protected, and static should be lowercase. 5 ]]> 6 </standard> 7 <code_comparison> 8 <code title="Valid: Lowercase function keyword."> 9 <![CDATA[ 10<em>function</em> foo() 11{ 12 return true; 13} 14]]> 15 </code> 16 <code title="Invalid: Uppercase function keyword."> 17 <![CDATA[ 18<em>FUNCTION</em> foo() 19{ 20 return true; 21} 22]]> 23 </code> 24 </code_comparison> 25</documentation> 26