wp-admin/includes/class-core-upgrader.php:279Determines if this WordPress Core version should update to an offered version or not.
$offered_verstringbool3 hooks fire while Core_Upgrader::should_update_to_version() runs, in this order:
Filters whether to enable automatic core updates for development versions.
Filters whether to enable minor automatic core updates.
Filters whether to enable major automatic core updates.
public static function should_update_to_version( $offered_ver ) { require ABSPATH . WPINC . '/version.php'; // $wp_version; // x.y.z $current_branch = implode( '.', array_slice( preg_split( '/[.-]/', $wp_version ), 0, 2 ) ); // x.y $new_branch = implode( '.', array_slice( preg_split( '/[.-]/', $offered_ver ), 0, 2 ) ); // x.y $current_is_development_version = (bool) strpos( $wp_version, '-' ); // Defaults: $upgrade_dev = get_site_option( 'auto_update_core_dev', 'enabled' ) === 'enabled'; $upgrade_minor = get_site_option( 'auto_update_core_minor', 'enabled' ) === 'enabled'; $upgrade_major = get_site_option( 'auto_update_core_major', 'unset' ) === 'enabled'; // WP_AUTO_UPDATE_CORE = true (all), 'beta', 'rc', 'development', 'branch-development', 'minor', false. if ( defined( 'WP_AUTO_UPDATE_CORE' ) ) { if ( false === WP_AUTO_UPDATE_CORE ) { // Defaults to turned off, unless a filter allows it. $upgrade_dev = false; $upgrade_minor = false; $upgrade_major = false; } elseif ( true === WP_AUTO_UPDATE_CORE || in_array( WP_AUTO_UPDATE_CORE, array( 'beta', 'rc', 'development', 'branch-development' ), true ) ) { // ALL updates for core. $upgrade_dev = true; $upgrade_minor = true; $upgrade_major = true; } elseif ( 'minor' === WP_AUTO_UPDATE_CORE ) { // Only minor updates for core. $upgrade_dev = false; $upgrade_minor = true; $upgrade_major = false; } } // 1: If we're already on that version, not much point in updating? if ( $offered_ver === $wp_version ) { return false; } // 2: If we're running a newer version, that's a nope. if ( version_compare( $wp_version, $offered_ver, '>' ) ) { return false; } $failure_data = get_site_option( 'auto_core_update_failed' ); if ( $failure_data ) { // If this was a critical update failure, cannot update. if ( ! empty( $failure_data['critical'] ) ) { return false; } // Don't claim we can update on update-core.php if we have a non-critical failure logged. if ( $wp_version === $failure_data['current'] && str_contains( $offered_ver, '.1.next.minor' ) ) { return false; } /* * Cannot update if we're retrying the same A to B update that caused a non-critical failure. * Some non-critical failures do allow retries, like download_failed. * 3.7.1 => 3.7.2 resulted in files_not_writable, if we are still on 3.7.1 and still trying to update to 3.7.2. */ if ( empty( $failure_data['retry'] ) && $wp_version === $failure_data['current'] && $offered_ver === $failure_data['attempted'] ) { return false; } } // 3: 3.7-alpha-25000 -> 3.7-alpha-25678 -> 3.7-beta1 -> 3.7-beta2. if ( $current_is_development_version ) { /** * Filters whether to enable automatic core updates for development versions. * * @since 3.7.0 * * @param bool $upgrade_dev Whether to enable automatic updates for * development versions. */ if ( ! apply_filters( 'allow_dev_auto_core_updates', $upgrade_dev ) ) { 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-core-upgrader.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.