Hello Ahmed!
Welcome to planDisney! There can be so many ticket options for Guests from all over the world and I hope that I understand the one you have exactly. According to my research, Guests from Europe, The Middle East, and Africa have the option to
purchase a theme park ticket ranging from 2 to 10 days long with the option to upgrade by adding on the Park Hopper Option.
If you purchase these tickets for 4 days then you can visit any park you like for whichever days you like. However, unless you have the
Park Hopper Option, you can only visit one of those Parks per day. You can leave and return to that same Park all day long pending there aren't any capacity issues. That means that you can visit one Park from the 4 main theme parks which are Magic Kingdom Park, Disney's Animal Kingdom Theme Park,
EPCOT, and Disney's Hollywood Studios, and savor it all day long. If you have the Park Hopper Option you can visit more than one Park per day and get small tastes from each.
Now, there is a ticket available to residents of the United States that is called the 4-Day, 4-Park ticket that has restrictions that require guests to only visit each of the four theme parks with one day allotted for each. I don't think you could purchase these tickets from Egypt but in case you did know you cannot repeat a Park with these tickets. You will have to enjoy each Park one at a time and with no repeats.
I hope this helps and you have a lovely time! Happy Planning!
-Nimmy