Обсуждение: Validating Whole Numbers

Is there a quick way to validate whole numbers for instance you can validate
a number

if (is_numeric($x)
{
output
}
else
{
output
}

Thanks in advance

How about:

WHERE x ~ '^[0-9]*$'


"Krog, Kenneth" wrote:
>
> Is there a quick way to validate whole numbers for instance you can validate
> a number
>
> if (is_numeric($x)
> {
> output
> }
> else
> {
> output
> }
>
> Thanks in advance
>
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> WHERE x ~ '^[0-9]*$'

You might want to change that asterick to a plus:

WHERE x ~ '^[0-9]+$'

so you don't get a false negative for an empty string.


Greg Sabino Mullane  greg@turnstep.com
PGP Key: 0x14964AC8 200203042125

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