symfony/symfony — comment on commit 35a61b3a52f6b0bd9e25c8e7e44348f5b3c42b31
File: src/Symfony/Component/HttpKernel/Debug/ExceptionHandler.php line 19
By fabpot:

No, that will never happen. How would a PHP core dev add a new constant in a previous version of PHP that is equivalent to one in a later version of PHP? That does not make sense.