WP hooks navigation: Home/browse • Actions index • Filters index
To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 6 times in this file.
| Line | Code |
|---|---|
| 976 | * 2. Before Maintenance Mode is enabled. |
| 977 | * 3. Before WordPress begins copying over the necessary files. |
| 978 | * 4. Before Maintenance Mode is disabled. |
| 979 | * 5. Before the database is upgraded. |
| 980 | * |
| 981 | * @since 2.5.0 |
| 982 | * |
| 983 | * @param string $feedback The core update feedback messages. |
| 984 | */ |
| 985 | apply_filters( 'update_feedback', __( 'Verifying the unpacked files…' ) ); |
| 986 | |
| 987 | // Sanity check the unzipped distribution. |
| 988 | $distro = ''; |
| 989 | $roots = array( '/wordpress/', '/wordpress-mu/' ); |
| 990 | |
| 991 | foreach ( $roots as $root ) { |
| 992 | if ( $wp_filesystem->exists( $from . $root . 'readme.html' ) |
| 993 | && $wp_filesystem->exists( $from . $root . 'wp-includes/version.php' ) |
| 994 | ) { |
| Line | Code |
| 1113 | /* translators: 1: WordPress version number, 2: The PHP extension name needed. */ |
| 1114 | __( 'The update cannot be installed because WordPress %1$s requires the %2$s PHP extension.' ), |
| 1115 | $wp_version, |
| 1116 | 'JSON' |
| 1117 | ) |
| 1118 | ); |
| 1119 | } |
| 1120 | |
| 1121 | /** This filter is documented in wp-admin/includes/update-core.php */ |
| 1122 | apply_filters( 'update_feedback', __( 'Preparing to install the latest version…' ) ); |
| 1123 | |
| 1124 | // Don't copy wp-content, we'll deal with that below. |
| 1125 | // We also copy version.php last so failed updates report their old version. |
| 1126 | $skip = array( 'wp-content', 'wp-includes/version.php' ); |
| 1127 | $check_is_writable = array(); |
| 1128 | |
| 1129 | // Check to see which files don't really need updating - only available for 3.7 and higher. |
| 1130 | if ( function_exists( 'get_core_checksums' ) ) { |
| 1131 | // Find the local version of the working directory. |
| Line | Code |
| 1190 | 'files_not_writable', |
| 1191 | __( 'The update cannot be installed because your site is unable to copy some files. This is usually due to inconsistent file permissions.' ), |
| 1192 | implode( ', ', $error_data ) |
| 1193 | ); |
| 1194 | } |
| 1195 | } |
| 1196 | } |
| 1197 | |
| 1198 | /** This filter is documented in wp-admin/includes/update-core.php */ |
| 1199 | apply_filters( 'update_feedback', __( 'Enabling Maintenance mode…' ) ); |
| 1200 | |
| 1201 | // Create maintenance file to signal that we are upgrading. |
| 1202 | $maintenance_string = '<?php $upgrading = ' . time() . '; ?>'; |
| 1203 | $maintenance_file = $to . '.maintenance'; |
| 1204 | $wp_filesystem->delete( $maintenance_file ); |
| 1205 | $wp_filesystem->put_contents( $maintenance_file, $maintenance_string, FS_CHMOD_FILE ); |
| 1206 | |
| 1207 | /** This filter is documented in wp-admin/includes/update-core.php */ |
| 1208 | apply_filters( 'update_feedback', __( 'Copying the required files…' ) ); |
| 1209 | |
| 1210 | // Copy new versions of WP files into place. |
| 1211 | $result = copy_dir( $from . $distro, $to, $skip ); |
| 1212 | |
| 1213 | if ( is_wp_error( $result ) ) { |
| 1214 | $result = new WP_Error( |
| 1215 | $result->get_error_code(), |
| 1216 | $result->get_error_message(), |
| 1217 | substr( $result->get_error_data(), strlen( $to ) ) |
| Line | Code |
| 1326 | $result->get_error_message(), |
| 1327 | substr( $result->get_error_data(), strlen( $wp_lang_dir ) ) |
| 1328 | ); |
| 1329 | } |
| 1330 | } |
| 1331 | } |
| 1332 | } |
| 1333 | |
| 1334 | /** This filter is documented in wp-admin/includes/update-core.php */ |
| 1335 | apply_filters( 'update_feedback', __( 'Disabling Maintenance mode…' ) ); |
| 1336 | |
| 1337 | // Remove maintenance file, we're done with potential site-breaking changes. |
| 1338 | $wp_filesystem->delete( $maintenance_file ); |
| 1339 | |
| 1340 | // 3.5 -> 3.5+ - an empty twentytwelve directory was created upon upgrade to 3.5 for some users, |
| 1341 | // preventing installation of Twenty Twelve. |
| 1342 | if ( '3.5' === $old_wp_version ) { |
| 1343 | if ( is_dir( WP_CONTENT_DIR . '/themes/twentytwelve' ) |
| 1344 | && ! file_exists( WP_CONTENT_DIR . '/themes/twentytwelve/style.css' ) |
| Line | Code |
| 1436 | |
| 1437 | // Deactivate the REST API plugin if its version is 2.0 Beta 4 or lower. |
| 1438 | _upgrade_440_force_deactivate_incompatible_plugins(); |
| 1439 | |
| 1440 | // Deactivate the Gutenberg plugin if its version is 11.8 or lower. |
| 1441 | _upgrade_590_force_deactivate_incompatible_plugins(); |
| 1442 | |
| 1443 | // Upgrade DB with separate request. |
| 1444 | /** This filter is documented in wp-admin/includes/update-core.php */ |
| 1445 | apply_filters( 'update_feedback', __( 'Upgrading database…' ) ); |
| 1446 | |
| 1447 | $db_upgrade_url = admin_url( 'upgrade.php?step=upgrade_db' ); |
| 1448 | wp_remote_post( $db_upgrade_url, array( 'timeout' => 60 ) ); |
| 1449 | |
| 1450 | // Clear the cache to prevent an update_option() from saving a stale db_version to the cache. |
| 1451 | wp_cache_flush(); |
| 1452 | // Not all cache back ends listen to 'flush'. |
| 1453 | wp_cache_delete( 'alloptions', 'options' ); |
| 1454 | |