global $wpdb;
if ( !
$meta_type || !
$meta_key || !
is_numeric( $object_id ) ) { return false;
} $object_id =
absint( $object_id );
if ( !
$object_id ) { return false;
} $table =
_get_meta_table( $meta_type );
if ( !
$table ) { return false;
} $meta_subtype =
get_object_subtype( $meta_type,
$object_id );
$column =
sanitize_key( $meta_type . '_id'
);
// expected_slashed ($meta_key)
$meta_key =
wp_unslash( $meta_key );
$meta_value =
wp_unslash( $meta_value );