Typoscript condition for empty variable

Question

Is there a way to use Typoscript condition to assign a different value to a TypoScript TEXT if a GET variable is empty ?

Something like that :

xxxx.1 = TEXT
[globalVar = GP:print != ""]
xxxx.1.value = Absent
[else]
xxxx.1.value = Present
[end]

Of course here the != "" doesn't work, so what should I use instead ?

Solution 1

Here is an example with "if":

1 = TEXT
1 {
    value = Absent
    override = Present
    override.if {
        isTrue.data = GP:print
    }
}

Solution 2

With globalString it's also possible to use a Regular Expression as comparison. Depending on the context this might also be a viable solution.

[globalString = GP:test = /.+/]
# This is only evaluated if GP:test contains one or more characters
[global]

Comments

[Micromega]

But is this is a condition? It looks like a complicated default value?

[Shufla]

That is not a condition. Also note that this will be cached. A condition could be [globalVar = GP:print = 1]. So your link would have to append "?print=1".

[Александр Фишер]

@Phpdna This looks like a complicated default value but afaik its the only way I could check if a GET-param is set. Note, that if "?print=0" will be evaluated as false and the value "Absent" will be used in this example.