Replace x() by isset(), !empty() or defaults()

- Remove extraneous parentheses around empty() calls
- Remove duplicate calls to intval(), count() or strlen() after empty()
- Replace ternary operators outputting binary value with empty() return value
- Rewrite defaults() without x()

view/php/none.php

@@ -7,5 +7,5 @@
  * only the pure content
  */
 
-if(x($page,'content')) echo $page['content'];
+if(!empty($page['content'])) echo $page['content'];