/**
* Gives the number of rows in the result set.
*
* Part of the Countable interface.
*
* @return int
*/
public function count()
{
if ($this->_count !== null) {
return $this->_count;
}
if ($this->_statement) {
return $this->_count = $this->_statement->rowCount();
}
return $this->_count = count($this->_results);
}
