Collapse-O-Matic Nested SwapTitles

[expand title="Fiction" rel="fiction" swaptitle="Is like non-non-fiction"]
[expandsub1 title="Star Wars" rel="submenu-highlander" swaptitle="Hyperspeed" expanded="true"]Target Content[/expandsub1]
[expandsub1 title="Star Trek" rel="submenu-highlander" swaptitle="Warpspeed"]Target Content[/expandsub1]
[/expand]

Fiction

Star Wars
Target Content

Star Trek
Target Content

T(-) Countdown Control – Separating the Time Units

string(10) "target is:" int(1685873880) string(14) "target is now:" string(7) "explode"
Fatal error: Uncaught TypeError: date(): Argument #2 ($timestamp) must be of type ?int, string given in /var/www/vhosts/spacedonkey.de/httpdocs/wp-content/plugins/t-countdown-control/t-countdown-control.php:445 Stack trace: #0 /var/www/vhosts/spacedonkey.de/httpdocs/wp-content/plugins/t-countdown-control/t-countdown-control.php(445): date() #1 /var/www/vhosts/spacedonkey.de/httpdocs/wp-includes/shortcodes.php(355): WP_TMinusCountdown->shortcode_digit() #2 [internal function]: do_shortcode_tag() #3 /var/www/vhosts/spacedonkey.de/httpdocs/wp-includes/shortcodes.php(227): preg_replace_callback() #4 /var/www/vhosts/spacedonkey.de/httpdocs/wp-includes/class-wp-hook.php(308): do_shortcode() #5 /var/www/vhosts/spacedonkey.de/httpdocs/wp-includes/plugin.php(205): WP_Hook->apply_filters() #6 /var/www/vhosts/spacedonkey.de/httpdocs/wp-includes/post-template.php(255): apply_filters() #7 /var/www/vhosts/spacedonkey.de/httpdocs/wp-content/themes/twentyseventeen/template-parts/post/content.php(58): the_content() #8 /var/www/vhosts/spacedonkey.de/httpdocs/wp-includes/template.php(785): require('...') #9 /var/www/vhosts/spacedonkey.de/httpdocs/wp-includes/template.php(718): load_template() #10 /var/www/vhosts/spacedonkey.de/httpdocs/wp-includes/general-template.php(204): locate_template() #11 /var/www/vhosts/spacedonkey.de/httpdocs/wp-content/themes/twentyseventeen/archive.php(43): get_template_part() #12 /var/www/vhosts/spacedonkey.de/httpdocs/wp-includes/template-loader.php(106): include('...') #13 /var/www/vhosts/spacedonkey.de/httpdocs/wp-blog-header.php(19): require_once('...') #14 /var/www/vhosts/spacedonkey.de/httpdocs/index.php(17): require('...') #15 {main} thrown in /var/www/vhosts/spacedonkey.de/httpdocs/wp-content/plugins/t-countdown-control/t-countdown-control.php on line 445