users"; // Error. $wp_db->update( $wpdb->users, array( 'displayname' => 'Kanobe!' ), array( 'ID' => 1 ) ); // Error. $query = "SELECT * FROM $wpdb->usermeta"; // Error. $wp_db->update( $wpdb->usermeta, array( 'meta_value' => 'bar!' ), array( 'user_id' => 1, 'meta_key' => 'foo' ) ); // Error. $query = "SELECT * FROM $wpdb->posts"; // Ok. if ( isset( $_SERVER['REMOTE_ADDR'] ) ) { // Warning. foo( $_SERVER['HTTP_USER_AGENT'] ); // Warning. } $x = $_COOKIE['bar']; // Warning. $y = $_SERVER['REQUEST_URI']; // Ok. // Error. $query = <<usermeta EOD; // Warning $phrase = <<