在同一页面上设置后立即获取 ID

Question

Thread_Body 中的 ThreadID 需要是 Thread_Titles id 的 id。 我该怎么做呢？

if (isset($_POST['Post_Thread'])) {
    if (empty($_POST['Post_Title'])) {
        echo "No Title No Thread.";
    } else {
        $Sec = mysql_real_escape_string($_GET['sec']);
        mysql_query("INSERT INTO Thread_Titles (Name, Section, Posted, Poster, Updated) VALUES('".cleanPost($_POST['Post_Title'])."', '".$Sec."', '".time()."', '".$ULN->Username."', '".time()."') ") or die(mysql_error()); 
    }
    if (empty($_POST['Post_Body'])) {
        echo "No Body No Thread.";
    } else {
        mysql_query("INSERT INTO Thread_Replies (Body, Posted, Poster, ThreadID) VALUES('".cleanPost($_POST['Post_Body'])."', '".time()."', '".$ULN->Username."', '".$ThreadID."') ") or die(mysql_error()); 
    }
}

这是所有期望表单的代码。

Answer 1

使用mysql_insert_id()

mysql_query("INSERT INTO Thread_Titles (Name, Section, Posted, Poster, Updated) VALUES('".cleanPost($_POST['Post_Title'])."', '".$Sec."', '".time()."', '".$ULN->Username."', '".time()."') ") or die(mysql_error());  
$ThreadID = mysql_insert_id();

仅供参考，you shouldn't use mysql_* functions in new code。它们不再维护and are officially deprecated。看到red box？改为了解 prepared statements，并使用 PDO 或 MySQLi - this article 将帮助您决定哪个。如果你选择 PDO，here is a good tutorial。