> For the complete documentation index, see [llms.txt](https://xlswriter-docs.viest.me/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xlswriter-docs.viest.me/zhong-wen-jian-ti/reader/data-type-const.md).

# 数据类型常量

```php
const TYPE_STRING = 0x01;    // 字符串
const TYPE_INT = 0x02;       // 整型
const TYPE_DOUBLE = 0x04;    // 浮点型
const TYPE_TIMESTAMP = 0x08; // 时间戳，可以将 xlsx 文件中的格式化时间字符转为时间戳
```