PHP Data Structure Algorithm Triplet_PHP Tutorial

/**
* 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] = $val3;
return true;
}
// Destroy triplet
public function destroy()
{
unset($this->_data);
return true;
}
// Return to the first 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] = $val;
return true;
}
// Whether in ascending order Sorting
public function isAscending()
{
return ($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 "
";
?>