# CSV

将已有 XLSX 文件转换为 CSV，无需先加载到 PHP 数组。

* [XLSX 转 CSV - 常规模式](/zhong-wen-jian-ti/csv/put-csv.md) —— 一次性将整张表写入 CSV 文件。
* [XLSX 转 CSV - 回调模式](/zhong-wen-jian-ti/csv/put-csv-callback.md) —— 通过回调逐行接收数据，便于流式处理或过滤。


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# 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:

```
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```

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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.