When to use mysqli::stmt_init?

[paddy_fields]

I make a prepared statement in the manner below;

$stmt = $db->prepare("SELECT * FROM table WHERE id = ?");
$stmt->bind_param('i',$id);
$stmt->execute();
$result = $stmt->fetch_assoc(); 
$stmt->close();

But I've seen certain scripts initialising the statement first using stmt_init

 

In what scenario would this be necessary/benifitial to do so?