wp-admin/includes/class-wp-automatic-updater.php:195Tests to see if we can and should update a specific item.
$typestring$itemobject$contextstringboolOne hook fires while WP_Automatic_Updater::should_update() runs, in this order:
Filters whether to automatically update core, a plugin, a theme, or a language.
public function should_update( $type, $item, $context ) { // Used to see if WP_Filesystem is set up to allow unattended updates. $skin = new Automatic_Upgrader_Skin(); if ( $this->is_disabled() ) { return false; } // Only relax the filesystem checks when the update doesn't include new files. $allow_relaxed_file_ownership = false; if ( 'core' === $type && isset( $item->new_files ) && ! $item->new_files ) { $allow_relaxed_file_ownership = true; } // If we can't do an auto core update, we may still be able to email the user. if ( ! $skin->request_filesystem_credentials( false, $context, $allow_relaxed_file_ownership ) || $this->is_vcs_checkout( $context ) ) { if ( 'core' === $type ) { $this->send_core_update_notification_email( $item ); } return false; } // Next up, is this an item we can update? if ( 'core' === $type ) { $update = Core_Upgrader::should_update_to_version( $item->current ); } elseif ( 'plugin' === $type || 'theme' === $type ) { $update = ! empty( $item->autoupdate ); if ( ! $update && wp_is_auto_update_enabled_for_type( $type ) ) { // Check if the site admin has enabled auto-updates by default for the specific item. $auto_updates = (array) get_site_option( "auto_update_{$type}s", array() ); $update = in_array( $item->{$type}, $auto_updates, true ); } } else { $update = ! empty( $item->autoupdate ); } // If the `disable_autoupdate` flag is set, override any user-choice, but allow filters. if ( ! empty( $item->disable_autoupdate ) ) { $update = false; } /** * Filters whether to automatically update core, a plugin, a theme, or a language. * * The dynamic portion of the hook name, `$type`, refers to the type of update * being checked. * * Possible hook names include: * * - `auto_update_core` * - `auto_update_plugin` * - `auto_update_theme` * - `auto_update_translation` * * Since WordPress 3.7, minor and development versions of core, and translations have * been auto-updated by default. New installs on WordPress 5.6 or higher will also * auto-update major versions by default. Starting in 5.6, older sites can opt-in to * major version auto-updates, and auto-updates for plugins and themes. * * See the {@see 'allow_dev_auto_core_updates'}, {@see 'allow_minor_auto_core_updates'}, * and {@see 'allow_major_auto_core_updates'} filters for a more straightforward way to * adjust core updates. * * @since 3.7.0 * @since 5.5.0 The `$update` parameter accepts the value of null. * * @param bool|null $update Whether to update. The value of null is internally used * to detect whether nothing has hooked into this filter. * @param object $item The update offer. */ $update = apply_filters( "auto_update_{$type}", $update, $item ); if ( ! $update ) { if ( 'core' === $type ) { $this->send_core_update_notification_email( $item ); } return false;Introduced in 3.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-wp-automatic-updater.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.