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Re: [PHP] Strange Right-Shift Problem

Posted by Jochem Maas on 01/03/06 12:44

Curt Zirzow wrote:
> On Fri, Dec 30, 2005 at 12:34:35PM -0600, Richard Lynch wrote:
>
>>On Thu, December 29, 2005 5:37 pm, Michael Gross wrote:
>>

....

>>
>>If you can determine the number of bits on your system, you could use
>>a different number from 11 on the two systems to get the answer you
>>want.
>>
>>if (is_32_bit_machine()){
>> $y = $x >> 11;
>>}
>>else{
>> $y = $x >> 43; //11 + 32 (guess)
>>}
>>
>>One hack for detecting 32-bit machine might be this:
>
>
> Isn't php suppose to handle all this? This seems odd to me.

I don't see how php can 'handle' people assuming that integers will
always be 32bits - the php code in the encryption algorythm is flawed
because it assumes that all integers are 32bits and doesn't platform
wordsize (terminology?) into account - how can php know that this was
not the intention?

>
>
> Curt.

 

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