Re: [PHP] variable type - conversion/checking

On Sat, Mar 16, 2013 at 6:52 PM, Maciek Sokolewicz <
[email protected]> wrote:

> Hi,
>>
>> I have tried to find a way to check if a character string is possible to
>> test whether it is convertible to an intger !
>>
>> any suggestion ?
>>
>> BR georg
>>
>
> All responses in this thread have been very nice; but you could also try a
> much simpler 2-step check:
>
> 1. is_numeric
> 2. if true > check if there's a decimal character in the string:
>
> if(is_numeric($str) && false === strpos('.', $str)) {
>    // it's an int for sure
> } else {
>    // might be a number, but it's definitly not an int
>
> }
>

Wrong.  is_numeric will accept 1e1, which is a float, so you would need to
check for e or E too.

- Matijn