I am wanting to establish a default sort by preference when the user hasn’t 
specified one.  I setup to test this with:


if ( !is_set( $sort_by_preference ) ) {

    $sort_by_preference = "government_wording";



But I am receiving a Notice error:

Notice:  Undefined variable: sort_by_preference in GIFI_codes.php on line 11- 
Line 11 is “if ( !is_set( $sort_by_preference ) ) {“What is the correct way to 
test this without triggering a Notice error?Ron
Ron Piggott


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