Adding threads with xThreads fields (file0 with PHP

[Victor]

Quote:array(20) { ["fid"]=> int(50) ["processed"]=> string(1) "1" ["my_post_key"]=> string(32) "e65e694dc908c3f1f9f8e4a695b49001" ["subject"]=> string(9) "dsadasdas" ["xtasel_gal_img"]=> string(3) "url" ["MAX_FILE_SIZE"]=> string(1) "0" ["xthreads_gal_cat"]=> string(4) "Inne" ["icon"]=> string(2) "-1" ["message_new"]=> string(9) "hgfhgfhfg" ["message"]=> string(9) "hgfhgfhfg" ["postoptions"]=> array(1) { ["subscriptionmethod"]=> string(0) "" } ["numpolloptions"]=> string(1) "2" ["submit"]=> string(13) "Napisz wątek" ["action"]=> string(12) "do_newthread" ["posthash"]=> string(32) "43b26bf325b33fa09df68db1c8bd5eeb" ["attachmentaid"]=> string(0) "" ["attachmentact"]=> string(0) "" ["quoted_ids"]=> string(0) "" ["tid"]=> int(0) ["xthreads_gal_img"]=> int(118) }

What does xThreads set for "xhtreads_gal_img" key?