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Posted by Mike P2 on 05/11/07 02:44
On May 10, 10:38 pm, Hendri Kurniawan <ask...@email.com> wrote:
> Man-wai Chang wrote:
>
> > How could I check whether a string variable contains nothing but space?
> > empty() does not work unless the string variable is "".
>
> empty(trim($variable));
>
> Hendri Kurniawan
Actually, that will return false if the string is ' 0 ' because the
number 0 is considered emptyness by empty(). The right way to do it
is:
if( trim( $variable ) == '' )
empty() will also make sure the variable is set for you. You don't
have this luxury since you are using trim() and an operator, so you
may have to do this instead:
if( !isset( $variable ) || trim( $variable ) == '' )
....if you are validating input.
-Mike PII
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