Update Datensatz dann löschen

Question

Ich versuche, einen Datensatz zu aktualisieren und dann einen anderen auf einmal zu löschen, aber es erlaubt mir nur, das eine oder das andere zu tun;

$update = "UPDATE user SET felcredits = '$value' WHERE username = '$user'"; 
$update2 = "DELETE FROM playeritems WHERE id = '$realid'"; 

Wie bekomme ich es beides zu tun? Ich habe Folgendes versucht;

$update = "UPDATE user SET felcredits = '$value' WHERE username = '$user'"; 
$update = "DELETE FROM playeritems WHERE id = '$realid'"; 

__

$update = "UPDATE user SET felcredits = '$value' WHERE username = '$user' DELETE FROM playeritems WHERE id = '$realid'"; 

__

FULL CODE:

if ($_SERVER['REQUEST_METHOD'] = $_POST AND isset($_POST['sell'])) { 
$sql = "SELECT felcredits FROM user WHERE username = '$user'"; 
$result = $db_conn->query($sql); 
if ($result->num_rows > 0) { 
    // output data of each row 
    while($row = $result->fetch_assoc()) { 
     $felcredits = $row['felcredits']; 
    } 
} 
$value = $felcredits + $value; 
$update = "UPDATE user SET felcredits = '$value' WHERE username = '$user'"; 
$update2 = "DELETE FROM playeritems WHERE id = '$realid'"; 
if ($db_conn->query($update) === TRUE) { 
    echo "<br />Details Updated"; 
} else { 
    echo "Error: " . $insert . "<br>" . $db_conn->error; 
} 

}

Answer 1

Sie ändern Versuchen Sie in Ihren vollständigen Code wie diesen

in Ihrem Code ausführen

---

if ($_SERVER['REQUEST_METHOD'] = $_POST AND isset($_POST['sell'])) { 
$sql = "SELECT felcredits FROM user WHERE username = '$user'"; 
$result = $db_conn->query($sql); 
if ($result->num_rows > 0) { 
// output data of each row 
while($row = $result->fetch_assoc()) { 
    $felcredits = $row['felcredits']; 
} 
}  
$value = $felcredits + $value; 
$update = "UPDATE user SET felcredits = '$value' WHERE username = '$user'"; 
$update2 = "DELETE FROM playeritems WHERE id = '$realid'"; 
if (($db_conn->query($update) === TRUE) && ($db_conn->query($update2) ===  TRUE)) { 
echo "<br />Details Updated"; 
} else { 
echo "Error: " . $insert . "<br>" . $db_conn->error; 
} 
} 

Answer 2

Das Problem ist hier:

$update = "UPDATE user SET felcredits = '$value' WHERE username = '$user'"; 
$update = "DELETE FROM playeritems WHERE id = '$realid'"; 

Ihre zweite SQL-Abfrage wird die erste außer Kraft setzen, so stellen separate Abfrage wie:

$update = "UPDATE user SET felcredits = '$value' WHERE username = '$user'"; 
mysqli_query($conn, $update); 

$delete = "DELETE FROM playeritems WHERE id = '$realid'"; 
mysqli_query($conn, $delete); 

wo $ conn die Verbindung handhaben ist