Correcting a piece of code, expert advice

Modify a piece of code, expert advice

$char = "111112222233333";
Preg_match_all ("| (. *)| U ", $char, $out, Preg_pattern_order);
echo $out [0][0];
echo $out [0][1];
echo $out [0][2];

The above code can get the value between the strings, but the effect I want is

I don't know how many nnnnn there are in the string, I want to get all the values between all the div and shuffle the order randomly.
such as the string "11111222223333344444";
The result I want to get is: 22222444443333311111


Trouble to know the master directly to the complete code, thank you

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------Solution--------------------

$char = "111112222233333";
Preg_match_all ("
------Solution--------------------
(.*)
------Solution--------------------
U ", $char, $out, Preg_pattern_order);

Shuffle ($out [0]);
$s = join ("', $out [0]);
Echo $s;

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