The `alternative' way to write if/elseif/else statements, using if();
   elseif(); else; endif; cannot be efficiently implemented without
   adding a large amount of complexity to the 3.0 parser.  Because of
   this, the syntax has been changed:
   
Example D-5. Migration: old if..endif syntax 
if ($foo);     echo "yep\n"; elseif ($bar);     echo "almost\n"; else;     echo "nope\n"; endif;
 |  
  | 
   Example D-6. Migration: new if..endif syntax 
if ($foo):     echo "yep\n"; elseif ($bar):     echo "almost\n"; else:     echo "nope\n"; endif;
 |  
  | 
   Notice that the semicolons have been replaced by colons in all
   statements but the one terminating the expression (endif).