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`post-thumbnail` is the incorrect value for the support type parameter

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edit approved Nov 8, 2019 at 16:33

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The post thumbnail is added to a post type as something this post type supports. If you want to remove post thumbnail functionality from a post type, you can call remove_post_type_support(). Regular posts are also defined as custom post types, so it should work for them too.

add_action( 'init', 'wpse4936_init', 100 /* Something high, to make sure all post types are registered */ );
function wpse4936_init()
{
    remove_post_type_support( 'post', 'post-thumbnail''thumbnail' );
    // Or remove it for all registerd types
    foreach ( get_post_types() as $post_type ) {
        remove_post_type_support( $post_type, 'post-thumbnail''thumbnail' );
    }
}

add_action( 'init', 'wpse4936_init', 100 /* Something high, to make sure all post types are registered */ );
function wpse4936_init()
{
    remove_post_type_support( 'post', 'post-thumbnail' );
    // Or remove it for all registerd types
    foreach ( get_post_types() as $post_type ) {
        remove_post_type_support( $post_type, 'post-thumbnail' );
    }
}

add_action( 'init', 'wpse4936_init', 100 /* Something high, to make sure all post types are registered */ );
function wpse4936_init()
{
    remove_post_type_support( 'post', 'thumbnail' );
    // Or remove it for all registerd types
    foreach ( get_post_types() as $post_type ) {
        remove_post_type_support( $post_type, 'thumbnail' );
    }
}

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created Dec 6, 2010 at 18:11

Jan Fabry

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add_action( 'init', 'wpse4936_init', 100 /* Something high, to make sure all post types are registered */ );
function wpse4936_init()
{
    remove_post_type_support( 'post', 'post-thumbnail' );
    // Or remove it for all registerd types
    foreach ( get_post_types() as $post_type ) {
        remove_post_type_support( $post_type, 'post-thumbnail' );
    }
}