보안 데이터베이스 업데이트를 위해 PHP 준비 문을 사용하는 방법은 무엇입니까?

<code class="php">$stmt = $this->mysqli->prepare("UPDATE datadump SET content=? WHERE id=?");
$stmt->bind_param('is', $id, $content);</code>

<code class="php">$content = isset($_POST['content']) ? $this->mysqli->real_escape_string($_POST['content']) : '';</code>

<code class="php">if ($stmt === false) {
  trigger_error($this->mysqli->error, E_USER_ERROR);
  return;
}

$content = $_POST['content'] ?: '';
$stmt->bind_param('si', $content, $id);
````
**Additional Notes:**

* Always remember to check for statement preparation errors using `if ($stmt === false)`.
* Bind your parameters in the same order as they appear in your SQL statement.

**Troubleshooting:**

If you're still facing issues, ensure that:

* Your MySQL connection is established correctly.
* The table and column names in your statement are spelled correctly.</code>