# 导出文件

> 如果路径下有相同命名的文件，新文件会覆盖老文件

```php
$config = [
    'path' => '/home/viest' // xlsx文件保存路径
];
$excel  = new \Vtiful\Kernel\Excel($config);

// fileName 会自动创建一个工作表，你可以自定义该工作表名称，工作表名称为可选参数
$filePath = $excel->fileName('tutorial01.xlsx', 'sheet1')
    ->header(['Item', 'Cost'])
    ->data([
        ['Rent', 1000],
        ['Gas',  100],
        ['Food', 300],
        ['Gym',  50],
    ])
    ->output();
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://xlswriter-docs.viest.me/zhong-wen-jian-ti/quick-start/create.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.