This code will be effective in functions.php or plugin folder.
add_filter( 'allowed_block_types', 'misha_allowed_block_types' );
function misha_allowed_block_types( $allowed_blocks ) {
return array(
'core/image',
'core/paragraph',
'core/heading',
'core/list'
);
}
Debug:
If your plugin has no effect, make sure your plugin has been activated.
Filter block according to different post type.
add_filter( 'allowed_block_types', 'misha_allowed_block_types', 10, 2 );
function misha_allowed_block_types( $allowed_blocks, $post ) {
$allowed_blocks = array(
'core/image',
'core/paragraph',
'core/heading',
'core/list'
);
if( $post->post_type === 'page' ) {
$allowed_blocks[] = 'core/shortcode';
}
return $allowed_blocks;
}