This tag checks the session to see if any given keys exist in a user session.
This is a very simple tag designed to be used in a condition statement. You may check to see if a key has been set (most likely by the session:set tag) in the session. It returns either true or false.
{{ if {session:has key="entered_survey"} }} <p>You already filled out the survey. Thanks for your feedback!</p>{{ /if }}Check if data exists in the user session.
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