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class Connections {
    public static $RBAC;
    public static $CMS;
    public static function init() {                 //ÒëÕß×¢Ô­ÎÄ´Ë´¦Ã»ÓÐstatic
        self::$RBAC =
            new mysqli('localhost','user','password','rbac');  //ÒëÕß×¢£º´Ë´¦±äÁ¿Àï´æ·ÅÁ˶ÔÏó
        self::$CMS =
            new mysqli('localhost','user','password','cms');
    }
}
Connections::init();
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public static function getRbac() { return self::$RBAC; }
public static function getCms() { return self::$CMS; }
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