On Sat, 2003-08-16 at 18:28, Robert Cummings wrote:
>
> PHP then I think the option should be investigated. The current isset()
> function fails many developers from what I can see, and I know I've
> experienced this problem before, and so I think a more appropriate
Aaaah, I was just documenting some code when I came across where I ran
into this problem... Let's say I have a configuration array of data for
an object. The configuration array is initialized as follows:
$this->settings = array
(
'name' => null,
'length' => null,
'width' => null,
'height' => null,
);
Now I have generic "get" and "set" method for my object:
function getData( $fieldName )
{
if( isset( $this->settings[$fieldName] ) )
{
return $fieldName;
}
$this->triggerWarning( 'Invalid data retrieval for class foo!' );
return null;
}
The set method works similarly, and here the null assignment to the
array is valid since I want to generate an warning if the data is not
explicitly set by the developer.
It is true that I could set the value to -1 or some such other hack, or
that I could use array_keys() and then check the values of the resulting
array, but these are hacks for a perfectly valid use of the value null
and in inadequate isset() function.
Now I'm sure many will argue that I should have individual "get" and
"set" methods for every data entry, but really, that shouldn't be
necessary (and let's be honest this follows a similar style to the
ini_get() function), and this method is much more versatile and easy to
maintain, not to mention I'm sure it reduces processing overhead.
Anyways I think I've said enough on this topic so i guess we'll see how
things go :)
Cheers,
Rob.
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