MySQL行已插入但未保存？

Question

I am inserting a row into a MySQL table from PHP and running a query right after the insert to get the key value of the row that was just inserted like so:

$stmt = $this->db->prepare("INSERT INTO user(vFirstName, vLastName, vEmail, vPassword, iSkilllevelid, vTournaments, vDays, dAddedDate, eStatus) VALUES (?,?,?,?,4,'Pick-Up','Saturday',NOW(),'Active')");
$stmt->bind_param("ssss", $firstName, $lastName, $email, $pwd);
$stmt->execute();
$stmt->close();

$stmt = $this->db->prepare('SELECT iUserId FROM user WHERE vEmail=?');
$stmt->bind_param("s", $email);
$stmt->execute();
$stmt->bind_result($iUserId);
while ($stmt->fetch()) {
    break;
}

After this code executes, $iUserId has the correct auto incremented key value (1143 for instance), but when I actually look at the database table, the row with that key (1143) does not exist. How is that possible??

Answer 1

Instead of selecting from the table after insertion, you should use mysqli::$insert_id:

$stmt = $this->db->prepare('
  INSERT INTO user
    (vFirstName, vLastName, vEmail, vPassword, iSkilllevelid,
       vTournaments, vDays, dAddedDate, eStatus)
  VALUES
    (?,?,?,?,4,"Pick-Up","Saturday",NOW(),"Active")
');
$stmt->bind_param('ssss', $firstName, $lastName, $email, $pwd);
$stmt->execute();
$iUserId = $this->db->insert_id;
$stmt->close();

As to why the inserted data is not appearing from other connections, it seems likely that your transaction has not been committed:

$this->db->commit();