Re[4]: [PHP] BUG in recursion

Hi, Ok, no I understand why. So this explains why every function must have return. But how can i program for example one recursion or where to put return so that test would not be waiting for return but at the end of this recursion i would like to do something with that $count for example. Hmm i wrote this very strange i hope you understand. I tell it simpler. I would like something is executed x many times (for such long if sentence is true) and thene do sometnihg else and continue with program, not looping here. -- tia, Uros mailto:uros.gruber@sir-mag.com Sunday, March 31, 2002, 1:34:20 AM, you wrote: LTW> On Sat, 2002-03-30 at 16:16, Uros Gruber wrote: >> Hi! >> >> This I simply don't understand why this code executes that >> way. So there is only inportant to put return after recursive >> call and it works like i wan't. I sometimes write small C >> programs and I don't remeber that code like this have to work >> that way.... Hm. LTW> Well, that's how it's supposed to work. Look at it like this: LTW> 1: function test() { LTW> 2: static $count = 0; LTW> 3: $count++; LTW> 4: echo $count; LTW> 5: if ($count < 10) { LTW> 6: test(); LTW> 7: } LTW> 8: echo 'j'; LTW> 9: } LTW> So the first thing that happens is you call test(). It executes LTW> its lines in order, including function calls. When it hits the LTW> call to test() on line 6, it calls test(), waits for it to LTW> return, and then continues on to line 8, echoing 'j'. LTW> This happens every time through, so when you get up to $i == 10, you LTW> have 10 test()s stacked up, each of them waiting on line 6 for the LTW> function call to test() to return. As each test() call returns, LTW> execution continues on to line 8, echos j, then returns. LTW> I'm in a hurry so I don't have too much time to make this much LTW> clearer (and my brain is not so good today anyway). If this still LTW> doesn't make sense then Google gives a zillion hits for 'introduction LTW> to recursion'. LTW> Hope this helps, LTW> Torben >> -- >> bye, >> Uros mailto:uros.gruber@sir-mag.com >> >> >> Sunday, March 31, 2002, 1:10:30 AM, you wrote: >> >> LTW> On Sat, 2002-03-30 at 15:59, Uros Gruber wrote: >> >> Hi! >> >> >> >> This is a code >> >> >> >> function Test() >> >> { >> >> static $count = 0; >> >> >> >> $count++; >> >> echo $count; >> >> if ($count < 10) { >> >> Test (); >> >> } >> >> echo "j"; >> >> } >> >> test(); >> >> >> >> Output is >> >> >> >> 12345678910jjjjjjjjjj >> >> >> >> Why is there 10 j at the and. If this would work it can be >> >> only one. If $count is grater than 10 it does not call itself >> >> but end. Is this maybe a bug or what. >> >> LTW> No, there should be 10 of them, since every time Test() returns, >> LTW> the function carries on executing. If you only want one 'j' >> LTW> printed then put a return statement after the call to Test(): >> >> LTW> function Test() >> LTW> { >> LTW> static $count = 0; >> >> LTW> $count++; >> LTW> echo $count; >> LTW> if ($count < 10) { >> LTW> Test(); >> LTW> return; >> LTW> } >> LTW> echo "j"; >> LTW> } >> LTW> Test(); >> >> >> LTW> Cheers! >> >> LTW> Torben >> >> >> LTW> -- >> LTW> Torben Wilson <torben@php.net> >> LTW> http://www.thebuttlesschaps.com >> LTW> http://www.hybrid17.com >> LTW> http://www.inflatableeye.com >> LTW> +1.604.709.0506 >> >> >> -- >> PHP General Mailing List (http://www.php.net/) >> To unsubscribe, visit: http://www.php.net/unsub.php >> >>