The key is that the first argument must be a Variable, because it is tested to see if it ISSET(), not if it's null. That is why you can't have any expression for the first argument - it would be like calling isset('foo'), which does not make any sense.
I think that this internal function addresses the need exactly, and that the correct solution has been arrived at.
Thanks Marcus!
Sincerely, Jason Garber
At 4/16/2004 09:38 PM +0200, Marcus Boerger wrote:
[RFC] ifsetor operator
Hello List,
i also agrre that an internal function is much better. And here is it as such an internal function (that does not result in an expensive function call).
Synopsis: "ifsetor" "(" value "," default ")"
Returns the value if it exists or a given default value.
Syntax: "ifsetor" "(" variable [ "," expression ] ")"
Semantic: - The value in question must be a variable. - The default value can be any expression. - The default value can be omitted in which case NULL will be used.
http://marcus-boerger.de/php/ext/ze2/ze2-ifsetor-20040416-2.diff.txt
best regards marcus
Friday, April 16, 2004, 2:12:04 AM, you wrote:
> Hello Jason,
> here is your operator patch: > http://marcus-boerger.de/php/ext/ze2/ze2-ifsetor-20040416.diff.txt
> currently it uses the following syntax:
> $var $: $defaul
> which would equal
> isset($var) ? $var : $default
> Notice that at the moment the operator is '$:' and not '?:'. This is > because i haven't looked on how to solve the conflicts i get when i > use '?:'. If there is more interest in that operator i could invest > more work in trying to fix that problem.
> best regards > marcus
> According to your options and the possibility to implement this as a > function. That would only work as a parser internal function like empty > or set. Doing so would be very easy i guess. Though it would require a > new keyword say 'ifsetor' (which reflects its purpose more as 'setor').
> best regards > marcus
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