包简介

PHP implementation of the Freedesktop Shared MIME-info Database standard.

README 文档

README

This package is a pure PHP implementation of the XDG Shared MIME-Info Database specification.

It is primarily aimed at MIME-type detection.

Installation

$ composer require xdg/mime

Usage

Implementation notes

Most XDG Shared MIME-Info implementations read their data from binary cache files generated by the update-mime-database program. This turns out to be impractical in the context of PHP for several reasons:

First, PHP doesn't have native mmap functionality, so reading these files at runtime can produce a lot of I/O.
Second, parsing these files at runtime has a non-negligible overhead.
And last, PHP runs on server environments where the update-mime-database program is often not available (and possibly even not installable).

Therefore, this library takes another approach: parsing the MIME database in its original XML format, and compiling it to executable PHP code. This yields several advantages:

Since most PHP applications have a build / deploy step, the overhead of parsing the database at runtime is eliminated entirely.
Generating PHP code allows leveraging the PHP opcode cache, which makes loading the database very fast.
Since performance is less paramount at build time, the library does additional work to optimize the generated PHP code for optimal runtime performance.

For convenience, this package ships with a pre-compiled database, built from the latest shared-mime-info database.

xdg/mime 适用场景与选型建议

xdg/mime 是一款基于 PHP 开发的 Composer 扩展包，目前已累计 71 次下载、GitHub Stars 达 1，最近一次更新时间为 2022 年 10 月 03 日，在 PHP 生态内属于活跃度较高的组件。

它主要适用于以下技术方向：「mime」「freedesktop」「xdg」「mime-type」「guesser」等业务场景。在实际项目中，围绕这些方向常见需要落地的问题包括：接口对接、性能调优、并发安全、与既有框架（Laravel / ThinkPHP / Yii / Webman 等）的兼容适配，以及生产环境的日志埋点与稳定性保障。

我们在过去多个企业项目中使用过 xdg/mime 或与其功能相近的方案，如果你在选型或落地过程中遇到问题，例如 版本兼容、二次改造、私有化封装、与内部系统对接、生产 BUG 排查，欢迎联系我们协助评估。

围绕 xdg/mime 我们能提供哪些服务？

定制开发 / 二次开发

基于 xdg/mime 在你已有业务上做功能扩展、字段裁剪、UI 适配、与内部账号 / 权限 / 日志系统的深度对接。

BUG 修复 & 性能优化

线上偶发问题、内存泄漏、慢查询、并发异常等排查修复；针对高流量场景做缓存、队列、索引层面的调优。

项目外包 & 长期维护

承接完整的项目从需求 → 设计 → 开发 → 上线 → 长期运维；也可按月提供技术保姆服务。

yvsm@zunyunkeji.com QQ：316430983 微信：yvsm316 西安尊云信息科技 · 专注 PHP / Go / 分布式系统研发

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