<?phpfunctionotherOperators($code) {switch($code) {case'>':case'<':$return ='<code class="comparison operator">'.htmlspecialchars($code) .'</code>';break;case'+':case'-':case'*':case'/':case'%':$return ='<code class="arithmetic operator">'.htmlspecialchars($code) .'</code>';break;case'=':$return ='<code class="assignment operator">'. $code .'</code>';break;case'@':$return ='<code class="error-control operator">'. $code .'</code>';break;default:$return =htmlspecialchars($code); }return$return; }?>
Quite inaccessible in non-CSS browsers ;]