How to prevent SQL injection?

[eluser]Unknown[/eluser]
[quote author="Volkof" date="1357301854"]Hi all,

Is there a way to prevent SQL injection?

In my view, I have a textarea to enter comments, but if the user enter something like

Code:

You know what, I'm sure this review is fine

You can see that there is an Apostrophe


Then this is gonna cause syntax error in my model;

Code:

$sql = "INSERT INTO Comment (comment, userID, reviewID)
  VALUES ('".$comment."', '".$userID."', '".$reviewID."')";
  $query = $this->db->query($sql);

Thanks in advance[/quote]
Simply do,

Code:

$this->db->query("INSERT INTO Comment (comment, userID, reviewID)
  VALUES (?, ?, ?)", array($comment, $userID, $reviewID));