How to change custom post type featured image metabox title and text labels?

Question

I registered a custom post type name of Banks.

Could i change this post types post-thumbnails meta box title and text value ?

Is that possible ?

Answer 1

Ok! Old question with multiple answers of the same wrong approach using different hooks! In case anyone needs, I'm posting a better way of doing this, without using extra hooks or editing metaboxes.

When registering a new CPT using register_post_type function, we can (and should!) pass a labels array to it's arguments. Some of these labels are for CPT edit screen.

$labels = [
    'name'                  => __( 'Banks', 'textdomain' ),
    'singular_name'         => __( 'Bank', 'textdomain' ),
    'add_new'               => __( 'Add New', 'textdomain' ),
    'add_new_item'          => __( 'Add New Bank', 'textdomain' ),  //used in post-new.php?post_type=bank
    'edit_item'             => __( 'Edit Bank', 'textdomain' ), //used in post.php
    'new_item'              => __( 'New Bank', 'textdomain' ),
    'all_items'             => __( 'All Banks', 'textdomain' ),
    'view_item'             => __( 'Vew Bank', 'textdomain' ),
    'search_items'          => __( 'Search Banks', 'textdomain' ),
    'not_found'             => __( 'No banks found', 'textdomain' ),
    'not_found_in_trash'    => __( 'No banks found in trash', 'textdomain' ),
    'parent_item_colon'     => __( 'Parent bank', 'textdomain' ),
    'menu_name'             => __( 'Banks', 'textdomain' ),
    'featured_image'        => __( 'Bank image', 'textdomain' ),    //used in post.php
    'set_featured_image'    => __( 'Set bank image', 'textdomain' ),    //used in post.php
    'remove_featured_image' => __( 'Remove bank image', 'textdomain' ), //used in post.php
    'use_featured_image'    => __( 'Use as bank image', 'textdomain' ), //used in post.php
    'insert_into_item'      => __( 'Insert into bank', 'textdomain' ),  //used in post.php
    'uploaded_to_this_item' => __( 'Uploaded to this bank', 'textdomain' ), //used in post.php
    'filter_items_list'     => __( 'Filter banks', 'textdomain' ),
    'items_list_navigation' => __( 'Banks navigation', 'textdomain' ),
    'items_list'            => __( 'Banks list', 'textdomain' ),
];

$args = [
    'description'           =>  'Bank CPT',
    'public'                =>  false,
    'show_ui'               =>  true,
    'show_in_menu'          =>  true,
    'show_in_admin_bar'     =>  false,
    'has_archive'           =>  false,
    'labels'                =>  $labels,
    'supports'              =>  ['thumbnail'],
    'query_var'             =>  false,
    'can_export'            =>  true,
    'show_in_rest'          =>  false,
];

register_post_type('bank', $args);