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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.
| Line | Code |
|---|---|
| 586 | list_theme_updates(); |
| 587 | if ( $core || $plugins || $themes ) |
| 588 | list_translation_updates(); |
| 589 | unset( $core, $plugins, $themes ); |
| 590 | /** |
| 591 | * Fires after the core, plugin, and theme update tables. |
| 592 | * |
| 593 | * @since 2.9.0 |
| 594 | */ |
| 595 | do_action( 'core_upgrade_preamble' ); |
| 596 | echo '</div>'; |
| 597 | include(ABSPATH . 'wp-admin/admin-footer.php'); |
| 598 | |
| 599 | } elseif ( 'do-core-upgrade' == $action || 'do-core-reinstall' == $action ) { |
| 600 | |
| 601 | if ( ! current_user_can( 'update_core' ) ) |
| 602 | wp_die( __( 'You do not have sufficient permissions to update this site.' ) ); |
| 603 | |
| 604 | check_admin_referer('upgrade-core'); |