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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 2 times in this file.
| Line | Code |
|---|---|
| 2179 | $try_rollback = true; |
| 2180 | elseif ( false !== strpos( $error_code, '__copy_dir' ) ) |
| 2181 | $try_rollback = true; |
| 2182 | elseif ( 'disk_full' === $error_code ) |
| 2183 | $try_rollback = true; |
| 2184 | } |
| 2185 | |
| 2186 | if ( $try_rollback ) { |
| 2187 | /** This filter is documented in wp-admin/includes/update-core.php */ |
| 2188 | apply_filters( 'update_feedback', $result ); |
| 2189 | |
| 2190 | /** This filter is documented in wp-admin/includes/update-core.php */ |
| 2191 | apply_filters( 'update_feedback', $this->strings['start_rollback'] ); |
| 2192 | |
| 2193 | $rollback_result = $this->upgrade( $current, array_merge( $parsed_args, array( 'do_rollback' => true ) ) ); |
| 2194 | |
| 2195 | $original_result = $result; |
| 2196 | $result = new WP_Error( 'rollback_was_required', $this->strings['rollback_was_required'], (object) array( 'update' => $original_result, 'rollback' => $rollback_result ) ); |
| 2197 | } |
| 2198 | } |
| 2199 | |
| 2200 | /** This action is documented in wp-admin/includes/class-wp-upgrader.php */ |