如何通过PHP取得MySQL procedure结果

mysql>DELIMITER //
mysql>CREATE PROCEDURE `yejr`()
->BEGIN
->SHOW TABLES;
->END; //
Query OK, 0 rows affected (0.12 sec)
mysql>DELIMITER ;
mysql>CALL yejr();
+------------------+
| Tables_in_test |
+------------------+
| yejr1 |
| yejr2 |
+------------------+

$mysqli = new mysqli("localhost", "root", "", "test");
if (mysqli_connect_errno()) {
printf("Connect failed: %s\n", mysqli_connect_error());
exit();
}
$query = "call yejr();";
if ($result = $mysqli->query( $query)) {
while($row = $result->fetch_row())
{
printf ("find table: %s \n", $row[0]);
}
}
$result->close();
?>