public function fetchColumn($query, array $values) {
		$col = null;
		try {
			$statement = $this->pdo->prepare($query);
			if ($statement->execute($values)) {
				$col = $statement->fetchColumn();
				if (!$col) return null;
			} else {
				$errorInfo = $statement->errorInfo();
				error_log($errorInfo[2]);
			}
		} catch (PDOException $e) {
			error_log($e->getMessage());
		}
		return $col;
	}
public function fetchColumn($query, array $values) {
		$col = null;
		try {
			$statement = $this->pdo->prepare($query);
			if ($statement->execute($values)) {
				$col = $statement->fetchColumn();
				if (!$col) return null;
			} else {
				$errorInfo = $statement->errorInfo();
				error_log($errorInfo[2]);
			}
		} catch (PDOException $e) {
			error_log($e->getMessage());
		}
		return $col;
	}
public function fetchColumn ( $ query , array $ values ) { $ col = null ; try { $ statement = $ this -> pdo -> prepare ( $ query ) ; if ( $ statement -> execute ( $ values ) ) { $ col = $ statement -> fetchColumn ( ) ; if ( ! $ col ) return null ; } else { $ errorInfo = $ statement -> errorInfo ( ) ; error_log ( $ errorInfo [ 2 ] ) ; } } catch ( PDOException $ e ) { error_log ( $ e -> getMessage ( ) ) ; } return $ col ; }
Retrieve first column in results set

@param string $query
@param array $values
@return string
Retrieve first column in results set