<?php
require_once __DIR__ . '/../vendor/autoload.php';

$schema = new \GraphQL\Type\Schema([
   'query' => new \GraphQL\Type\Definition\ObjectType([
       'name' => 'Query',
       'fields' => [
           'testBoolean' => [
               'type' => \GraphQL\Type\Definition\Type::boolean(),
               'args' => [
                   'boolInput' => [
                       'type' => \GraphQL\Type\Definition\Type::boolean()
                   ]
               ],
               'resolve' => function ($value, $args, $context, $info) {
                   echo $args['boolInput'] ? 'true' : 'false';
                   return $args['boolInput'];
               }
           ]
       ]
   ])
]);

$query = '
  query($boolQueryVariable: Boolean) {
    testBoolean(boolInput: $boolQueryVariable)
  }
';

$testQueryVariableValues = [true, false, 1, 0, 0.0, 'true', 'false', '1', '0', '0.0'];
$outputQueryVariableValues = ['true', 'false', '1', '0', '0.0', '"true"', '"false"', '"1"', '"0"', '"0.0"'];
$queryVariables = array_map(null, $testQueryVariableValues, $outputQueryVariableValues);

foreach ($queryVariables as $queryVariable) {
    echo $queryVariable[1] . ' was coerced to ';
    $queryResult = \GraphQL\GraphQL::executeQuery($schema, $query, null, null, ['boolQueryVariable' => $queryVariable[0]])->toArray();
    echo PHP_EOL . PHP_EOL;
}