Lists and Non-Nulls

Lists and Non-Nulls are wrapping types in GraphQL. This means, that they cannot be used solely, but must feature an inner type, which they hold.

Lists

php-graphql represents lists of other types as instances of the class GraphQLList, which accepts an inner type as parameter in the constructor.

use GraphQL\Types\GraphQLList;
use GraphQL\Types\GraphQLInt;

$ListOfInts = new GraphQLList(new GraphQLInt()); 

Non-Null

php-graphql represents non-null types as instances of the class GraphQLNonNull, which accepts an inner type as parameter in the constructor.

use GraphQL\Types\GraphQLNonNull;
use GraphQL\Types\GraphQLInt;

$NonNullInt = new GraphQLNonNull(new GraphQLInt());