Buongiorno non sono un programmatore ma autodidatta fino al 2004 riuscivo a programmare il mirc con il vincula ( ex chat msn ) ho creato un sito per gli amministratori di condominio funziona alla grande il condominino può registrarsi e se dimentica la pass può richiedere il reset della pass e nella sua area privata può scaricare i file pdf e/o doc ho aperto un dominio gratuito per fare i test nella area privata il condomino può chattare in privato sia con l'amministratore e/o con il condomino ma non riesco a eliminare la chat chiedo aiuto posto sia le tabelle e i codici
Codice PHP:
CREATE TABLE `chats` (  `chat_id` int(11) NOT NULL,  `from_id` int(11) NOT NULL,  `to_id` int(11) NOT NULL,  `message` text NOT NULL,  `opened` tinyint(1) NOT NULL DEFAULT 0,  `created_at` datetime NOT NULL DEFAULT current_timestamp()) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
-- --------------------------------------------------------
---- Table structure for table `conversations`--
CREATE TABLE `conversations` (  `conversation_id` int(11) NOT NULL,  `user_1` int(11) NOT NULL,  `user_2` int(11) NOT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;-----------------------------------------------------------form<ul id="chatList"                class="list-group mvh-50 overflow-auto">                <?php if (!empty($conversations)) { ?>                    <?php 
                    
foreach ($conversations as $conversation){ ?>                    <li class="list-group-item">                    <p>Elimina chat</p>                    <form action="delchat.php" method="post" enctype="multipart/form-data">                    <input type="hidden" name="chat_id">                      <input type="submit" name="del" value="Elimina chat">                    </form>                        <a href="chat.php?user=<?=$conversation['username']?>"                           class="d-flex                                  justify-content-between                                  align-items-center p-2">                            <div class="d-flex                                        align-items-center">                                <img src="uploads/<?=$conversation['p_p']?>"                                     class="w-10 rounded-circle">                                          <h3 class="fs-xs m-2">                                    <?=$conversation['username']?><br>                                    <?=$conversation['name']?><br>                      <small>                        <?php                           echo lastChat($_SESSION['user_id'], $conversation['user_id'], $conn);                        ?>                      </small>                                </h3>                                            </div>                            <?php if (last_seen($conversation['last_seen']) == "Active") { ?>                                <div title="online">                                    <div class="online"></div>                                            </div>                            <?php ?>                            ----------------------------------------------------------                            delchat.php                            <?php  
                                session_start
();
                                
# check if the user is logged in                                if(isset($_POST['del'])){                                                                        # database connection file                                    include 'app/db.conn.php';
                                    #                                     $id_1  = $_SESSION['user_id'];                                    $id_2  = $_POST['id_2'];
                                    
$sql "DELETE c, e                                    FROM chats c                                    LEFT JOIN conversation e ON e.conversation_id = c.chat_id                                    LEFT JOIN (SELECT conversation_id, COUNT(*) count FROM conversations GROUP BY conversation_id) t                                    ON t.conversation_id = chat_id                                    WHERE e.conversation_conversation_id IS NULL OR t.count < 3;";                                    $stmt$conn->prepare($sql);                                    $stmt->execute([$chat_id$conversation_id]);

                                    
header("Location: home.php");                                    exit;                                }
                                
?>