[Phpwm] unsigning a numeric variable

[Phil Beynon]

> On 5/5/06, Phil Beynon <phil at infolinkelectronics.co.uk> wrote:
> > But since these
> > are pixel widths for a mogrify resize, as part of a system manager for
> > resizing previously uploaded pics that might be needing tweaking a bit,
> > entering a negative pixel value rates as 'bad' and causes execution
> > silliness. :-)
>
> What happens with zero?
>
> Cheers,
>
> --
> Jon Ramsey

I need to flag two types of error message to the user, the first is designed
to let them know that they can't put a pixel subtraction number in the
field, in that if they want to reduce by say 10 pixels by putting -10 in
then it won't let them. Then the actual number they put in gets run through
a bandpass filter which is predefined in the site config file for upper and
lower limits of image sizing. This will also flag up an error if the max/min
sizes are exceeded.

The idea being whilst zero would be bad, having them resize a pic to
1,000,000 wide / high would be worse as apart from the storage aspect it
would nail the server for an awfully long time!


Regards,

Phil Beynon
Sales director

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