PHP-MYSQL无法在mysqli_multi_query上删除

Question

I have two querys that have to delete rows on different tables when a checkbox is checked. The problem is that only executes one of the querys and ignores the other one.

Here's the code:

if(isset($_POST["che".$i.""])){
        $query4  = "DELETE FROM gastos WHERE id_dedicaciondos = $idded AND id_usuario=$idu;";
        $query4 .= "DELETE FROM dedicacio WHERE id_dedicacion = $idded AND id_usuario=$idu;" ;
        if(mysqli_multi_query($connexio,$query4)){
                  do{
                    if ($result = mysqli_store_result($connexio)) {
                        mysqli_free_result($result);
                    }

                }while(mysqli_next_result($connexio) && mysqli_more_results($connexio));
            }
    }

Only deletes the rows from the second query... If I change the order of the querys the result is exactly the same, only deletes from the query "delete from dedicacio".

What can I do?

Thanks in advance

UPDATE

I've tried the next:

if(isset($_POST["che".$i.""])){
        $query4  = "DELETE FROM gastos WHERE id_dedicaciondos = ".$idded.";";
       $query5 =  "DELETE FROM dedicacio WHERE id_dedicacion = ".$idded.";";

       if(mysqli_query($connexio,$query4)){
            echo "YES!";
       }
       if(mysqli_query($connexio,$query5)){
            echo "YES2!";
       }
    }

It shows "YES!" and "YES2!" But the query don't delete anything on the "gastos" table :(

UPDATE

I solved by myself adding a "ON DELETE CASCADE" to the id_dedicaciondos that references id_dedicacions.

Answer 1

TRy to use this code:

if ($mysqli->multi_query($query4)) {
    do {
       if ($result = $mysqli->store_result()) {
            $result->free();
        }
        /* print divider */
        if ($mysqli->more_results()) {
            printf("-----------------\n");
        }
    } while ($mysqli->next_result());
}

Answer 2

Just tested this and it works fine:

<?php

    $mysqli = new mysqli("localhost", "user", "pass", "testdb"); 

    $query4 = "DELETE FROM test_table1 WHERE num = 0;";
    $query4 .= "DELETE FROM test_table2 WHERE num = 0;";

    $mysqli->multi_query($query4); 
    while ($mysqli->next_result()) {;} // flush queries

    $mysqli->close();

?>