在 PHP 7.4 中报错：header() expects at least 1 parameter, 0 given （is_callable(‘Header’) 为 true）

{
  "errors": [
    {
      "debugMessage": "header() expects at least 1 parameter, 0 given",
      "message": "Internal server error",
      "extensions": {
        "category": "internal"
      },
      "locations": [
        {
          "line": 5,
          "column": 7
        }
      ],
      "path": [
        "onlineStoreSession",
        "versionedOnlineStore",
        "theme"
      ],
      "trace": [
        {
          "file": "E:\\wwwroot\\object\\Modules\\OnlineStoreThemeGraphQl\\Resolver\\OnlineStoreThemeResolver.php",
          "line": 96,
          "function": "header()"
        },
        {
          "call": "Modules\\OnlineStoreThemeGraphQl\\Resolver\\OnlineStoreThemeResolver::Modules\\OnlineStoreThemeGraphQl\\Resolver\\{closure}(array(4), 'name')"
        }
      ]
    }
  ],
  "data": {
    "onlineStoreSession": {
      "versionedOnlineStore": {
        "theme": null
      }
    }
  }
}

        $fields = array_keys($resolveInfo->getFieldSelection());

        return  array_reduce($fields, function($carry, $field) use($fieldResolvers){
            if (isset($fieldResolvers[$field])) {
                $carry[$field] = is_callable($fieldResolvers[$field])? $fieldResolvers[$field](): $fieldResolvers[$field];
            }

            return $carry;
        }, []);

$fields = array_keys($resolveInfo->getFieldSelection());
print_r($fields);
exit;

Array
(
    [0] => id
    [1] => editable
    [2] => createdAt
    [3] => editedAt
    [4] => name
    [5] => role
    [6] => previewable
    [7] => url
    [8] => themeStoreThemeId
    [9] => metadata
    [10] => presets
    [11] => themeSettingsCategories
)

        $fields = array_keys($resolveInfo->getFieldSelection());

        return  array_reduce($fields, function($carry, $field) use($fieldResolvers){

            if (isset($fieldResolvers[$field])) {
                if ($field == 'name') {
                    var_dump($fieldResolvers[$field]);
                    var_dump(is_callable($fieldResolvers[$field]));
                    exit;
                }
                $carry[$field] = is_callable($fieldResolvers[$field])? $fieldResolvers[$field](): $fieldResolvers[$field];
            }

            return $carry;
        }, []);

string(6) "Header"
bool(true)

        $fields = array_keys($resolveInfo->getFieldSelection());

        return  array_reduce($fields, function($carry, $field) use($fieldResolvers){
            if (isset($fieldResolvers[$field])) {
                $carry[$field] = ($fieldResolvers[$field] instanceof \Closure) ? $fieldResolvers[$field](): $fieldResolvers[$field];
            }

            return $carry;
        }, []);