如果未使用php（laravel）定义数组元素，则将null插入数据库

我试图将数组插入到表中，但数组的某些元素未定义。 我想在元素未定义的地方插入null。 数组如下所示：

[0]=>Array
 (
   [0] => Array
    (
        [Id] => 120
        [Title] => PHP
        [Year] => 2011
        [Version] =>5.5
    )

   [1] => Array
    (
        [Id] => 121
        [Title] => Javascript
        [Year] => 2010
        [Version] =>7
    )

 )
 [1]=>Array
 (
   [0] => Array
    (
        [Id] => 1
        [Title] => Html
        [Author] => peter
    )

   [1] => Array
    (
        [Id] => 1
        [Title] => Asp
        [Author] => john
    )

 )
  [2]=>Array
 (
   [0] => Array
    (
        [Id] => 1
        [Title] => Html
        [Year] => 2011
        [Page] =>40
    )

   [1] => Array
    (
        [Id] => 1
        [Title] => Asp
        [Year] => 2010
        [Page] =>220
    )

 )

表中有6个字段id、标题、年份、作者、版本和页面

 $this ->table->create(array(
    'id'       => $data['Id'] ,
   'title'     => $data['Title'] ,
   'year'      => $data['Year'] ,
   'author'    => $data['Author'],
   'version'   => $data['Version'] ,
   'page'      => $data['Page'] ,
   ))

未定义变量时如何向表中插入null。比如像 未定义（$data['Version']）？空：$data['Version']！！！！！！php函数或任何可能的解决方案？

---

谢谢

您可能能够：

foreach($data as $row)
{
    $info = array(
       'id'       => $this->getData($row, 'Id'),
       'title'     => $this->getData($row, 'Title'),
       'year'      => $this->getData($row, 'Year'),
       'author'    => $this->getData($row, 'Author'),
       'version'   => $this->getData($row, 'Version'),
       'page'      => $this->getData($row, 'Page'),
    );

    $this->table->create(array_filter($info));
}

public function getData($data, $key)
{
    return isset($data[key]) ? $data[key] : null;
}

---

使用列上的默认NULL子句创建表。列已->可空（）只插入了第一个子数组，但不是全部。谢谢。它工作得非常好。代码中有输入错误，只需将$data更改为$row即可。