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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 |
---|---|
521 | list_theme_updates(); |
522 | if ( $core || $plugins || $themes ) |
523 | list_translation_updates(); |
524 | unset( $core, $plugins, $themes ); |
525 | /** |
526 | * Fires after the core, plugin, and theme update tables. |
527 | * |
528 | * @since 2.9.0 |
529 | */ |
530 | do_action( 'core_upgrade_preamble' ); |
531 | echo '</div>'; |
532 | include(ABSPATH . 'wp-admin/admin-footer.php'); |
533 |
|
534 | } elseif ( 'do-core-upgrade' == $action || 'do-core-reinstall' == $action ) { |
535 |
|
536 | if ( ! current_user_can( 'update_core' ) ) |
537 | wp_die( __( 'You do not have sufficient permissions to update this site.' ) ); |
538 |
|
539 | check_admin_referer('upgrade-core'); |