Description:
------------
Hello,

I'm usually using https://gist.github.com/lyrixx/17074868cdfabd4c783e
to find segfault, or line that hang.

But, as of PHP 7.0 this does not work anymore because it seems declare tick is now local for each PHP file.

I check in https://www.php.net/manual/en/migration70.php But I could not find any mention to this BC breack.

Test script:
---------------
------------------
<?php
// File a.php:
register_tick_function(function() {
    $bt = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 1);
    $last = reset($bt);
    $info = sprintf("%s +%d\n", $last['file'], $last['line']);
    file_put_contents('php://output', $info, FILE_APPEND);
});

declare(ticks=1);

function foobar()
{
    $c = 1;
}

require __DIR__.'/b.php';

foobar();
------------------
<?php
// File b.php:
function bingo()
{
    $e = 1;
}

bingo();
------------------

Then 
* docker run -it --rm -v $(pwd):/app  php:5.6 php /app/a.php
* docker run -it --rm -v $(pwd):/app  php:7.0 php /app/a.php

Expected result:
----------------
The same output for PHP 5.6 and PHP 7.0:

/app/a.php +9
/app/a.php +14
/app/b.php +6
/app/b.php +5
/app/b.php +8
/app/a.php +16
/app/a.php +13
/app/a.php +18


Actual result:
--------------
/app/a.php +9
/app/a.php +14
/app/a.php +16
/app/a.php +13
/app/a.php +18