Ondrej and Jason,
Just pondering the proposed coalesce() variants in the context of
Ondrej's scenario I came upon two thoughts.
I forgot to mention the nice single parameter case of a coalesce()
function like this, which would return null if not set:
$x = coalesce($REQUEST['x']);
Also, the same characteristics could be easily preserved, as far as
warnings and errors, by not passing any unset variables to the
callback in a ucoalesce() function call:
$x = ucoalesce("is_number", $REQUEST['x']);
With that assertion, is_number() would only be called if the request
variable were set, otherwise returning null, modeling the ternary
expression you included, Ondrej.
Thanks,
-Noah
On Jun 14, 2005, at 12:08 AM, Ondrej Ivanič wrote:
Jason Garber wrote:
ifsetor is NOT input filtering, it is not a complex, general
purpose
stuff like 'ifsetof()' is good when is use as:
$x = ifsetor($ANY_var, 'Default Value');
but too many times I need additional checks like this:
$x = isset($_REQUEST['x']) && is_number($x) ? $_REQUEST['x'] : null;
It's possible to add additional third parameter to ifsetof() ?
ifsetof(variable, expression [, callback])
callback is a function which take one argument (value of variable) and
return true or false. If return false 'expression' will be return from
ifsetor().
Usage:
$x = ifsetor($_REQUEST['x'], null, 'is_number');
It needs to be fast, and simple.
Hm... It's simple, but It's not very clean at first look.
What's your opinion?
--
Ondrej Ivnaic
([EMAIL PROTECTED])
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