Re: [PHP] question about ? :

[Miguel Cruz]

On 13 Jun 2002, Lee Doolan wrote:
> the arrays below have dates like
>     dateA= array( 0=> "03", 1=> "22", 2=> "02") 
> 
> for 22march2002.
> 
> why does this work:
> 
>     $retval= ($dateA[2] != $dateB[2])
>          ? strcmp($dateA[2], $dateB[2])
>          : (($dateA[0] != $dateB[0])
>              ? strcmp($dateA[0], $dateB[0])
>              : (($dateA[1] != $dateB[1])
>                  ? strcmp($dateA[1], $dateB[1])
>                  : 0));
> 
> 
> but not this:
> 
>     $retval= ($dateA[2] != $dateB[2])
>          ? strcmp($dateA[2], $dateB[2])
>          : ($dateA[0] != $dateB[0])
>          ? strcmp($dateA[0], $dateB[0])
>          : ($dateA[1] != $dateB[1])
>          ? strcmp($dateA[1], $dateB[1])
>          : 0;

Why does this:

   $x = 3 + 5 * 7;

produce different results from this:

   $x = (3 + 5) * 7;

?

miguel


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