[日志](writelog.md) [卡通头像](%E5%8D%A1%E9%80%9A%E5%A4%B4%E5%83%8F.md) [两位小数](%E4%B8%A4%E4%BD%8D%E5%B0%8F%E6%95%B0.md) [图片转base64](%E5%9B%BE%E7%89%87%E8%BD%ACbase64.md) [auth加密解密](auth%E5%8A%A0%E5%AF%86%E8%A7%A3%E5%AF%86.md) [phpoffice/phpspreadsheet导入导出](phpoffice-phpspreadsheet%E5%AF%BC%E5%85%A5%E5%AF%BC%E5%87%BA.md)