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Storing and Retrieving Number String/Array
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Try changing in php.ini .
Btw, I am not really sure if this will work !
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memory_limit = 8M ; Maximum amount of memory a script may consume (8MB)
Btw, I am not really sure if this will work !
Last edited by nav33n; Jun 18th, 2008 at 8:29 am.
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134217728 bytes is exactly the same as 128 megabyte. So how much memory does your computer have?
Perhaps you have an endless loop somewhere in your code. Could you post the code that causes this error?
Perhaps you have an endless loop somewhere in your code. Could you post the code that causes this error?
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LOL, I just checked my memory it is at 128MB 
(hence 134217728 bytes)
This is just for localhost at the moment so im not too worried if it cant work on the internet, its more for a home requirement for now.
It is just a loop that declares arrays and I think it declares too many but I need it to declare an x amount.
its like:
Now I dont know how many times each loop goes for, depends on the requirements but it is ALOT so I dont know what to do at the moment?
Also on the 128MB thing what happens if I changed it to 99999.
Will the calculation work at the risk of blowing up my computer? or just freezing IE?
Thanks, Regards X
(hence 134217728 bytes)This is just for localhost at the moment so im not too worried if it cant work on the internet, its more for a home requirement for now.
It is just a loop that declares arrays and I think it declares too many but I need it to declare an x amount.
its like:
PHP Syntax (Toggle Plain Text)
Now I dont know how many times each loop goes for, depends on the requirements but it is ALOT so I dont know what to do at the moment?
Also on the 128MB thing what happens if I changed it to 99999.
Will the calculation work at the risk of blowing up my computer? or just freezing IE?
Thanks, Regards X
Last edited by OmniX; Jun 18th, 2008 at 8:58 am.
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Originally Posted by OmniX 
LOL, I just checked mine it is at 128MB
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Originally Posted by OmniX
Now I dont know how many times each loop goes for, depends on the requirements but it is ALOT so I dont know what to do at the moment?
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Originally Posted by OmniX
Also on the 128MB thing what happens if I changed it to 99999.
Will the calculation work at the risk of blowing up my computer? or just freezing IE?
With 99999 the code will still crash:
Each string is 5 bytes (1 byte for each character)
the inner loop loops 99.999 times.
The outher loop also
So memory required (in MB) == ((99.999 * 99.999 * 5) /1024) /1024 = 9536 MB
lol..You can increase the execution time limit, by either changing max_execution_time to 0 (in php.ini ) or use set_time_limit(0); in your script.
Ignore this post !
This will crash your browser anyway 
Ignore this post !
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for($i=0;$i<999999999999;$i++) {
for($i=0;$i<999999999999;$i++) {
$alpha[] = --$i . " " . $i . " " . ++$i;
}
}
Last edited by nav33n; Jun 18th, 2008 at 9:10 am.
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Well a family friend has told me to construct a program on vary vague requirements.
But it requires at least 5 nested for loops and the iterations come out to something like intializing like 1mil plus arrays but by the end the script it removes like 800,000 of them.
So is this just not possible with php?
Do I have to pass it onto java or learn it myself?
Any possible fixes? Thanks
PS: can I increase "max_execution_time = 30"? Dosent seem to be working when I change the value to like 60/120.
But it requires at least 5 nested for loops and the iterations come out to something like intializing like 1mil plus arrays but by the end the script it removes like 800,000 of them.
So is this just not possible with php?
Do I have to pass it onto java or learn it myself?
Any possible fixes? Thanks
PS: can I increase "max_execution_time = 30"? Dosent seem to be working when I change the value to like 60/120.
Last edited by OmniX; Jun 18th, 2008 at 9:30 am.
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Initializing 1.000.000 arrays shouldn't be a problem (as long as they aren't bigger then 134 bytes), but what you asked:
will result in 99.999 * 99.999 loops, which is something like 10.000.000.000 loops.
So the answer is: yes, a million arrays in the memory are possible
PHP Syntax (Toggle Plain Text)
So the answer is: yes, a million arrays in the memory are possible
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so what is the max? (just so I can have an idea)
Last edited by OmniX; Jun 18th, 2008 at 9:32 am.
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Depends on how big your array is.
Let's say that the string in the array looks like this:
(NOTE: I don't know exactly how PHP memory works with memory, so it might also be 6 bytes as in C and C++, where the last byte represents an 'end of string' character)
so you have 128 MB of memory, but you want to keep some of that available for other programs like windows etc. So let's say we can use half of it == 64 MB. That would lead to the following calculation:
(64*1024^2) / 5 = 13.421.772 elements for your array.
So to keep it on the safe side: max = 10 million
Let's say that the string in the array looks like this:
1 2 3 In theory this requires 5 bytes of memory. (3 numbers and two spaces)(NOTE: I don't know exactly how PHP memory works with memory, so it might also be 6 bytes as in C and C++, where the last byte represents an 'end of string' character)
so you have 128 MB of memory, but you want to keep some of that available for other programs like windows etc. So let's say we can use half of it == 64 MB. That would lead to the following calculation:
(64*1024^2) / 5 = 13.421.772 elements for your array.
So to keep it on the safe side: max = 10 million
Last edited by niek_e; Jun 18th, 2008 at 9:40 am.
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Likewise, I recommend writing to a file or a db and then reading the data back into an array when needed. What do you need a million arrays for? This program sounds like a major resource hog, I would probably try to find another way of doing things.
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