+/**
+ * Gets the best available (and enabled) Auto-Update for WordPress Core.
+ *
+ * If there's 1.2.3 and 1.3 on offer, it'll choose 1.3 if the install allows it, else, 1.2.3
+ *
+ * @since 3.7.0
+ *
+ * @return bool|array False on failure, otherwise the core update offering.
+ */
+function find_core_auto_update() {
+ $updates = get_site_transient( 'update_core' );
+ if ( ! $updates || empty( $updates->updates ) )
+ return false;
+
+ include_once( ABSPATH . 'wp-admin/includes/class-wp-upgrader.php' );
+
+ $auto_update = false;
+ $upgrader = new WP_Automatic_Updater;
+ foreach ( $updates->updates as $update ) {
+ if ( 'autoupdate' != $update->response )
+ continue;
+
+ if ( ! $upgrader->should_update( 'core', $update, ABSPATH ) )
+ continue;
+
+ if ( ! $auto_update || version_compare( $update->current, $auto_update->current, '>' ) )
+ $auto_update = $update;
+ }
+ return $auto_update;
+}
+
+/**
+ * Gets and caches the checksums for the given version of WordPress.
+ *
+ * @since 3.7.0
+ *
+ * @param string $version Version string to query.
+ * @param string $locale Locale to query.
+ * @return bool|array False on failure. An array of checksums on success.
+ */
+function get_core_checksums( $version, $locale ) {
+ $url = $http_url = 'http://api.wordpress.org/core/checksums/1.0/?' . http_build_query( compact( 'version', 'locale' ), null, '&' );
+
+ if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
+ $url = set_url_scheme( $url, 'https' );
+
+ $options = array(
+ 'timeout' => ( ( defined('DOING_CRON') && DOING_CRON ) ? 30 : 3 ),
+ );
+
+ $response = wp_remote_get( $url, $options );
+ if ( $ssl && is_wp_error( $response ) ) {
+ trigger_error( __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="https://wordpress.org/support/">support forums</a>.' ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ), headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE );
+ $response = wp_remote_get( $http_url, $options );
+ }
+
+ if ( is_wp_error( $response ) || 200 != wp_remote_retrieve_response_code( $response ) )
+ return false;
+
+ $body = trim( wp_remote_retrieve_body( $response ) );
+ $body = json_decode( $body, true );
+
+ if ( ! is_array( $body ) || ! isset( $body['checksums'] ) || ! is_array( $body['checksums'] ) )
+ return false;
+
+ return $body['checksums'];
+}
+