PHP code to randomly extract some elements from an array

/**
* Randomly extract array elements
* author: notuser
* 2012-12-29
*/
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 ); // Sort from small to large, modify as needed
return $getArray;
}
}
 //Test code
$keywords = array(
"we",
"you",
"them"
);
$getValue=new getValues();
$getValue->inputValue($keywords);
$ key = $getValue->getValue(1);//Randomly extract an element from the array
echo $key;
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