How to check if session is defined 1

[DrumAt5280]

I created a session varable "session.pre_info" and it works great.

But how do I check to see if the session is declared already?

<cfif IsStruct("session.pre_info")>
   Do this...
      <cfelse>
         or do this...                    
</cfif>

Is that right?

 

[Sarky78]

If you want to check that the session structure is defined then yes you would use IsStruct("Session"). but if you want to check for the existance of a variable within the scope, then use good old isDefined('Session.pre_info').

hope this helps!

Tony

 

[DrumAt5280]

Thanks. So, if i want to check to see if the session is defined i would do this?

<cfif IsStruct("session")>
   Do this...
      <cfelse>
         or do this...                    
</cfif>

 

[Sarky78]

When a session is created session variables called cfid and cftoken are created so you could check for their existance using the method i mention above.

Tony

 

[imstillatwork]

if you want to check for the variable session.pre_info

then the most reliable way would be

<cfif StructKeyExists(session,"pre_info") >
 Yes, it does exist.
<cfelse>
 No, it doesn't exist.
</cfif>