[Phpwm] unsigning a numeric variable

[Phil Beynon]

> On 5/4/06, Phil Beynon <phil at infolinkelectronics.co.uk> wrote:
> > Is there a quicker functional way to unsign a numeric variable,
> apart from
> > squaring it then taking the square root of the resultant?
>
> $startingval = -99999999;
> $newval = 0 - $startingval;
>

That's only going to work if it was made conditional, if($startingval < 0){}
which would be less efficient than my solution. Otherwise the resultant
would normally be negative.

All I'm trying to do here is catch any numeric negatives in a form
submission, which in reality shouldn't really ever occur. 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. :-)

Good example though of the requirements of making applications idiot
user-proofed!


Regards,

Phil Beynon
Sales director

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