Php randomly extracts code for some elements from the array

Php randomly extracts code for some elements from the array. For more information, see The code is as follows:
Class getValues {
Public function inputValue ($ inputArray ){
$ This-> inputArray = $ inputArray;
}
Public function getValue ($ number ){
$ This-> number = $ number;
For ($ I = 0; $ I <$ this-> number; $ I ++ ){
$ Index = rand (0, count ($ this-> inputArray)-1-$ I );
$ GetArray [$ I] = $ this-> inputArray [$ index];
Unset ($ this-> inputArray [$ index]);
For ($ k = $ index; $ k <count ($ this-> inputArray)-1; $ k ++ ){
$ This-> inputArray [$ k] = $ this-> inputArray [$ k + 1];
}
}
// Asort ($ getArray); // sorts data from small to large and can be modified as needed
Return $ getArray;
}
}

// Test code
$ Keywords = array (
"We ",
"You ",
"They"
);
$ GetValue = new getValues ();
$ GetValue-> inputValue ($ keywords );
$ Key = $ getValue-> getValue (1); // randomly selects an element from the array.
Echo $ key;
?>