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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 |
|---|---|
| 1531 | $try_rollback = true; |
| 1532 | elseif ( false !== strpos( $error_code, '__copy_dir' ) ) |
| 1533 | $try_rollback = true; |
| 1534 | elseif ( 'disk_full' === $error_code ) |
| 1535 | $try_rollback = true; |
| 1536 | } |
| 1537 | |
| 1538 | if ( $try_rollback ) { |
| 1539 | /** This filter is documented in wp-admin/includes/update-core.php */ |
| 1540 | apply_filters( 'update_feedback', $result ); |
| 1541 | |
| 1542 | /** This filter is documented in wp-admin/includes/update-core.php */ |
| 1543 | apply_filters( 'update_feedback', $this->strings['start_rollback'] ); |
| 1544 | |
| 1545 | $rollback_result = $this->upgrade( $current, array_merge( $parsed_args, array( 'do_rollback' => true ) ) ); |
| 1546 | |
| 1547 | $original_result = $result; |
| 1548 | $result = new WP_Error( 'rollback_was_required', $this->strings['rollback_was_required'], (object) array( 'update' => $original_result, 'rollback' => $rollback_result ) ); |
| 1549 | } |
| 1550 | } |
| 1551 | |
| 1552 | /** This action is documented in wp-admin/includes/class-wp-upgrader.php */ |