删除不适用于pdo

Question

The following code is not working even though I've tested it by putting this on the page alone. To make this clear just after this query I'm doing a select query to display all the user in the DB.

$db->query("DELETE FROM Projet_Client WHERE username = '$_GET[d]'");
echo "<div class='alert alert-success text-middle'><strong>Succès</strong>, le 
client a été supprimé.</div>";

Here is the "echo" of the query to show you how it looks like :

DELETE FROM Projet_Client 
WHERE 
username = 'a75ea99ce47306ec259d4c905bb9c3f762a531ee'

(I'm using my sql). Thank you.

I changed the code ant it looks like this :

    $db->setAttribute(PDO::ATTR_EMULATE_PREPARES,false);
    $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_WARNING );
    try {
        $stmt = $db->prepare('DELETE FROM Projet_Client WHERE username= :username');
        $stmt->bindParam(':username', $_GET['d']); 
        $stmt->execute();

    } catch(Exception $e){
            echo 'Exception -> ';
            var_dump($e->getMessage());
    }

However no exception are being throw.

The problem has been solved. I had to change the constraint with the foreign key : ON DELETE = CASCADE

Answer 1

Are you sure that the query is being executed properly ? Your query looks okay to me.

Maybe you can try to echo the error (if there is one) by using this :

if ($conn->query($sql) !== false) {
echo "Record deleted successfully";} else {
echo "Error deleting record: " . $conn->error;

}