Weak hands cannot be planted, meager skills have no foundation. Shallow wisdom is futile, how can one hope for a good name?扰扰从役倦，屑屑身事微。少壮轻年月，迟暮惜光辉。
"foo" ).
* @param WP_Block $block_instance The block instance.
* @return mixed The value computed for the source.
*/
function _block_bindings_post_meta_get_value( array $source_args, $block_instance ) {
if ( empty( $source_args['key'] ) ) {
return null;
}
if ( empty( $block_instance->context['postId'] ) ) {
return null;
}
$post_id = $block_instance->context['postId'];
// If a post isn't public, we need to prevent unauthorized users from accessing the post meta.
$post = get_post( $post_id );
if ( ( ! is_post_publicly_viewable( $post ) && ! current_user_can( 'read_post', $post_id ) ) || post_password_required( $post ) ) {
return null;
}
// Check if the meta field is protected.
if ( is_protected_meta( $source_args['key'], 'post' ) ) {
return null;
}
// Check if the meta field is registered to be shown in REST.
$meta_keys = get_registered_meta_keys( 'post', $block_instance->context['postType'] );
// Add fields registered for all subtypes.
$meta_keys = array_merge( $meta_keys, get_registered_meta_keys( 'post', '' ) );
if ( empty( $meta_keys[ $source_args['key'] ]['show_in_res