Array
(
[_last_editor_used_jetpack] => Array
(
[0] => classic-editor
)
[_edit_lock] => Array
(
[0] => 1623609605:1
)
[_edit_last] => Array
(
[0] => 1
)
[site-sidebar-layout] => Array
(
[0] => default
)
[site-content-layout] => Array
(
[0] => default
)
[theme-transparent-header-meta] => Array
(
[0] => default
)
[stick-header-meta] => Array
(
[0] => default
)
[from] => Array
(
[0] => "34629"|1
)
[subtitle] => Array
(
[0] => Pieśni op. 1, 3, 4 i bez oposu / Songs Op. 1, 3, 4 and without opus number
)
[ISBN] => Array
(
[0] => 9790274017231
)
)