// POSITIONAL PARAMETERS: $users = $conn->query("FROM User WHERE User.name = ?", array('Arnold')); $users = $conn->query("FROM User WHERE User.id > ? AND User.name LIKE ?", array(50, 'A%')); // NAMED PARAMETERS: $users = $conn->query("FROM User WHERE User.name = :name", array(':name' => 'Arnold')); $users = $conn->query("FROM User WHERE User.id > :id AND User.name LIKE :name", array(':id' => 50, ':name' => 'A%'));