Description:
------------
zend_language_parser.y on line 81 gives the '?:' operator left associativity when 
it should be right as in virtually every other language that has a ternary 
operator. [see also bug 61915]

Due to the massive amount of changes in PHP 7, some of which break backwards compatibility, it would be a great idea to fix this long standing issue. Although it has been pointed out before that this behavior is documented it's a non-sane and unconventional result. In other languages that implement the ternary operator the result of the test script is 'Swiss Cheese'. This result is expected and conventional.

This issue has been pointed out multiple times before (61915, 25356).



Test script:
---------------
$arg = "3";
$food = (  ($arg == '1') ? 'Banana' :
           ($arg == '2') ? 'Apple' :
           ($arg == '3') ? 'Toast' :
           ($arg == '4') ? 'Cantalope' :
           ($arg == '5') ? 'Swiss Cheese' : 'Fig Newton Cookie'
		 );
echo $food;


Expected result:
----------------
Toast

Actual result:
--------------
Swiss Cheese