Data structure & algorithm (PHP description) Triplet Triplet

Data structure & algorithm (PHP description) Triplet Triplet

/**
 * Triplet
*/
class Triplet
{
 private $_data = null;
 // Initialize triplet
 public function init($val1, $val2, $val3)
 {
 $this -> _data[0] = $val1;
 $this -> _data[1] = $val2;
 $this -> _data[2] = $val3;
 return true;
 }
 // Destroy the triple
 public function destroy()
 {
 unset($this -> _data);
 return true;
 }
 // Return the value of $key
 public function get($key)
 {
 if ($key < 1 || $key > 3) return false;
 return$this -> _data[$key-1];
 }
 // Set the value of the $key element to $val
 public function put($key, $val)
 {
 if ($key < 1 || $key > 3) return false;
 $this -> _data[$key-1] = $val;
 return true;
 }
 // Whether to sort in ascending order
 public function isAscending()
 {
 return ($this -> _data[0] <= $this -> _data[1]) && ($this - > _data[1] <= $this -> _data[2]);
 }
 // Whether to sort in descending order
 public function isDescending()
 {
 return ($this -> _data[0] > ;= $this -> _data[1]) && ($this -> _data[1] >= $this -> _data[2]);
 }
 // Get the maximum value
 public function max( )
 {
 return ($this -> _data[0] >= $this -> _data[1])? ($this -> _data[0] >= $this -> _data[2 ])?$this -> _data[0] :$this -> _data[2] : ($this -> _data[1] >= $this -> _data[2])?$this - > _data[1] :$this -> _data[2];
 }
 // Get the minimum value
 public function min()
 {
 return ($this -> _data[0] <= $this -> _data[1])? ($this -> _data[0] <= $this -> _data[2])?$this -> _data[0] :$this -> _data[ 2] : ($this -> _data[1] <= $this -> _data[2])?$this -> _data[1] :$this -> _data[2];
 }
 }

$objTriplet = new Triplet();
echo"init:";
var_dump($objTriplet -> init(1, 2, 3));
echo"";

echo "get 1:";
var_dump($objTriplet -> get(1));
echo"";
echo"get 4:";
var_dump($objTriplet -> get(4 ));
echo""; // false
echo"put 3,4:";
var_dump($objTriplet -> put(3, 4));
echo"";

echo"max:";
var_dump($objTriplet -> max());
echo"";
echo"min:";
var_dump($objTriplet -> ; min());
echo"";

echo"isAscending:";
var_dump($objTriplet -> isAscending());
echo"";
 echo"isDescending:";
var_dump($objTriplet -> isDescending());
echo"";

?>