T.Lensselink wrote:
>
> On Fri, 26 Oct 2007 14:32:42 +0200, Jochem Maas <jochem@xxxxxxxxxxxxx>
> wrote:
>> Paul Scott wrote:
>>> On Fri, 2007-10-26 at 12:52 +0200, Jochem Maas wrote:
>>>
>>>> since when is there an arbitrary maximum recursion limit???
>>> Since forever... ;)
>> thats you think, personally I test this kind of thing when Im
>> not sure:
>>
php -r 'function foo() { static $x = 1; echo "foo ", $x++, "\n"; foo(); } foo();'
...
>
> Running your code shows that there is a limit. Although it doesn't throw an
> error.
> It just stops after n recursive calls:
>
> php4 recursive calls: 796
> php5 recursive calls: 49841
> php6 recursive calls: 6007
A. this is not the output of the script
B. do you think these numbers are the same for everyone?
heck they're not even garanteed to be the same between 2 runs
on the same machine with the same php binary.
C. it doesn't just stop, a segmentation fault occurs.
e.g.:
last 2 lines of output for 4.3.10-19:
foo 11137
foo Segmentatie fout
last 2 lines of output for 4.3.10-19:
foo 11147
foo Segmentatie fout
last 2 lines of output for 5.1.1:
foo 37435
foo Segmentation fault
last 2 lines of output for 5.1.1:
foo 37436
foo Segmentation fault
last 2 lines of output for 5.1.2:
foo 30795
foo Segmentatie fout
last 2 lines of output for 5.1.2:
foo 30787
foo Segmentatie fout
Therfore there is NO recursion limit in php (not withstanding a specific limit
in functions belonging to an XML extention). the percieved limit is php running
out of memory ... as long as there is memory php will continue to recurse.
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