PHP mysqli Commands out of sync; you can't run this command now

Question

In my db I have some stored procedures.

I want to call the one of them, and according to the results I get from this procedure, i will determine weather to call the

Answer 1

The currently accepted answer wont work as-is, i think next_result() should not be called before the first result.

This is an example that does work:

if (!$mysqli->multi_query("CALL p()")) {
    echo "CALL failed: (" . $mysqli->errno . ") " . $mysqli->error;
}

do {
    if ($res = $mysqli->store_result()) {
        printf("---\n");
        var_dump($res->fetch_all());
        $res->free();
    } else {
        if ($mysqli->errno) {
            echo "Store failed: (" . $mysqli->errno . ") " . $mysqli->error;
        }
    }
} while ($mysqli->more_results() && $mysqli->next_result());

From the PHP manual http://php.net/manual/en/mysqli.quickstart.stored-procedures.php