Question

In my PDO implementation, I am attempting to use an inserted value in the limit clause of the SQL statement:

$sql = "SELECT * FROM table ORDER BY datetime DESC LIMIT :limit";
$params = array(":limit" => 5);
$query = $dbh->prepare($sql);
$query->execute($params);
$result = $query->fetchall(PDO::FETCH_ASSOC);

$params and $query are correctly returned, but $result is empty.

Upon running print_r($query->errorInfo);, I get the following:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''5'' at line 1

How can I use PDO’s insert values in this query? Am I doing it right?

Answer 1

See PHP PDO bindValue in LIMIT

Basically, you need to cast the limit value to int using intval() when binding.