Global var for category

  • hello, i’m a newbie in wordpress but i’m trying to make something good with it…
    Here, i’m editing a plugin and I would like to know where I can find a list with the global variables we can use.
    In the plugin, I see he’s calling some of them :
    global $post, $tableposts, $wp_version, $wpdb;
    But where are they come from ?
    I’m searching for the global var for the current category…

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