哪一个是准备好的语句中的正确代码?$ID_user=$mysqli->insert_id;
还是$ID_user=$stmt->insert_id;
?
$stmt = $mysqli->prepare("INSERT INTO users (first_name, last_name) VALUES (? ,?)");
$stmt->bind_param("ss",$first_name,$last_name);
if($stmt->execute())
{
$ID_user=$mysqli->insert_id; // or $ID_user=$stmt->insert_id;
}