php - 我准备好的 pdo 插入语句中的错误

Question

我正在尝试使用 pdo 上的准备语句插入值，但我遇到了这个错误

警告：PDOStatement::execute() [pdostatement.execute]: SQLSTATE[HY093]: Invalid parameter number: no parameters are bound in C:\wamp\www\chat\insert.php 第 23 行

$db = new PDO($dns, $user, $pass);

$sql = "INSERT INTO `conversations_t` (`fk_crname_c`, `fk_username_c`, `message_c`) VALUES (?, ?, ?)";

$sq_stat = $db->prepare($sql);
// bind column to variable for display
$sq_stat->bindColumn(1, $chatname);
$sq_stat->bindColumn(2,$username);
$sq_stat->bindColumn(3, $message);


$count=$sq_stat->execute();

Answer 1

使用bindParam与否：bindValue_bindColumn

$sq_stat -> bindParam(1, $chatname);
$sq_stat -> bindParam(2, $username);
$sq_stat -> bindParam(3, $message);

Answer 2

bindColumn是为了结果。你想要bindValue或bindParam

$sq_stat->bindValue(1, $chatname);
$sq_stat->bindValue(2,$username);
$sq_stat->bindValue(3, $message);

Answer 3

对于插入语句，请尝试将您的值作为数组传递给执行函数。

$db = new PDO($dns, $user, $pass);

$sql = "INSERT INTO `conversations_t` (`fk_crname_c`, `fk_username_c`, `message_c`) VALUES (?, ?, ?)";

$sq_stat = $db->prepare($sql);

$count = $sq_stat->execute(array($chatname, $username, $message));