Using PHP PDO prepared statements for update operations

Question

I'm trying to update my database using the following query:

$sth = "UPDATE rpacks SET rpacks_location VALUES (:location) WHERE rpacks_id = (:id)";
$q = $conn->prepare($sth);
$q->execute(array(':location'=>$location, ':id'=>$id));

But I get this error

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[42000]: Syntax error or access violation: 1064 There is an error in your SQL syntax; check the Manual for the correct syntax to use near 'VALUES ('test') WHERE rpacks_id = ('2')' on line 1 of

Answer 1

change to:

$sth = "Update rpacks SET rpacks_location = :location WHERE rpacks_id = :id";

Answer 2

There is an error in your update query because you used the insert query syntax.

The following is the correct query:

$sql = "UPDATE rpacks SET rpacks_location = :location WHERE rpacks_id = :id";
$stmt = $conn->prepare($sql);
$stmt->execute([':location'=>$location, ':id'=>$id]);

refer to: http://dev.mysql.com/doc/refman/5.0/ en/update.html