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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 |
|---|---|
| 535 | list_theme_updates(); |
| 536 | if ( $core || $plugins || $themes ) |
| 537 | list_translation_updates(); |
| 538 | unset( $core, $plugins, $themes ); |
| 539 | /** |
| 540 | * Fires after the core, plugin, and theme update tables. |
| 541 | * |
| 542 | * @since 2.9.0 |
| 543 | */ |
| 544 | do_action( 'core_upgrade_preamble' ); |
| 545 | echo '</div>'; |
| 546 | include(ABSPATH . 'wp-admin/admin-footer.php'); |
| 547 | |
| 548 | } elseif ( 'do-core-upgrade' == $action || 'do-core-reinstall' == $action ) { |
| 549 | |
| 550 | if ( ! current_user_can( 'update_core' ) ) |
| 551 | wp_die( __( 'You do not have sufficient permissions to update this site.' ) ); |
| 552 | |
| 553 | check_admin_referer('upgrade-core'); |