Re: Trying to insert a large number from php to mysql

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On Wed, 2006-12-20 at 10:58 -0500, Jon Anderson wrote:
> WeberSites LTD wrote:
> > I'm trying to insert the number 1970324970930197 into a mysql BigInt(20)
> > field.
> > If I do a direct insert from mysql command prompt and select the record I
> > get
> > back the same number.
> >  
> > If I do this from PHP I get back 1970324970930000. Notice that the 197 at
> > the
> > end is not 000.
> AFAIK, PHP uses 32-bit (signed) integers, so you're stuck to values no 
> bigger than around 2 billion. Anything larger, and you have to store it 
> as a string: use a "BigInt" class, or GMP functions to do calculations. 
> I believe MySQL will do the right thing if you insert a string "integer" 
> into an integer field.

Just to add... the reason the number changes is because PHP detects that
it is too big and so stuffs it into a float where precision is then
lost.

Cheers,
Rob.
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