add helloworld example

Author: joonlabs

examples/helloworld/index.php

@@ -0,0 +1,28 @@
+<?php
+// include the php-graphql-autoloader
+require '../../src/autoloader.php';
+
+use GraphQL\Types\GraphQLObjectType;
+use GraphQL\Fields\GraphQLTypeField;
+use GraphQL\Types\GraphQLString;
+use GraphQL\Schemas\Schema;
+use GraphQL\Servers\Server;
+
+// build the query type
+$QueryType = new GraphQLObjectType("Query", "Root Query", function (){
+    return [
+        new GraphQLTypeField(
+            "hello",
+            new GraphQLString(),
+            "Your first hello world GraphQL-Application",
+            function (){ return 'Hello world!'; }
+        )
+    ];
+});
+
+// build the schema
+$schema = new Schema($QueryType);
+
+// start a server
+$server = new Server($schema);
+$server->listen();