Invalid argument in class-wp-posts-list-table.php

[newkind]

HI,

In the file :

wp-admin/includes/class-wp-posts-list-table.php

there's a variable $post_formats set to :

$post_formats = get_theme_support( 'post-formats' );

and right below it there's a loop which causes Warnings when $post_formats doesn't return array
of arguments but boolean :

foreach ( $post_formats[0] as $format ) {

WP should check if $post_formats is array so we wouldn't end up with Invalid Arguments Supplied warning.

Thanks!

[DrewAPicture]

33025.diff​ adds an is_array() check consistent with other areas in core.

[wonderboymusic]

In 33667:

In WP_Posts_List_Table::inline_edit(), check that $post_formats[0] is an array before traversing.

Props DrewAPicture.
Fixes #33025.