How can I check if a page has a specific ID, and if true output a text?
I thought about something like this (pseudocode):
<f:if condition="{current.page.uid}=='78'">
<p>I am Page 78</p>
</f:if>
If you want to use this in an FLUIDTEMPLATE (page.10 = FLUIDTEMPLATE
as example) you can access the page data with {data.uid}
.
<f:if condition="{data.uid} == 78">
<p>I am Page 78</p>
</f:if>
In an extbase Extension you can make it like @dimitri-l says.