Description:
------------
I wrote a script to test the behavior of construct "declare/tick", and found that the HTTP outputs among different requests were inconsistent (The outputs were supposed to be the same according to the official documentation).

I have tested the same script on three different web servers (which have different versions of PHP installed: 4.4.7, 5.1.6, 5.2.5, etc). I also tested the script using other different ways (from command line, running the script as a CGI script, etc). The script and other releated information (including PHP information) was put at this URL: 

http://www.deminy.net/php/bugs/php_bug_tick.tar.gz

The bug reported here is similar to http://bugs.php.net/bug.php?id=11536 (register_tick_function weirdness)

Reproduce code:
---------------
The code and other information are put here:
http://www.deminy.net/php/bugs/php_bug_tick.tar.gz

Expected result:
----------------
All HTTP requests to the script sould return only 5 lines beside the 1st line (which contains a string "#!/opt/php5/bin/php").

Actual result:
--------------
Basically, for the 1st HTTP request, the output contains 5 lines; for the 2nd request, the output may contain 10 lines; for the 3nd request, the output may contain 15 lines ......for the Nth request, the output contains 5 lines again, and so on ......