包简介

Adds support for strikethrough, subscript and superscript in Markdown (using `<del>`, `<sub>` and `<sup>` HTML tags).

README 文档

README

This package adds support for subscript and superscript in Markdown (using <sub> and <sup> HTML tags). This package also duplicates the logic used in the League Strikethrough Extension (which generates <del> tags).

There is no official spec that supports both subscript and strikethrough. As they both typically use the tilde character (~), we follow the extended syntax of Markdown Guide. That means that strikethrough with only one tilde is necessarily NOT supported. Subscript and strikethrough can be nested, similar to how emphasis works (~Subscript ~~Subscript and striked~~~).

Added markdown features

Name	Markdown	Result
Superscript	`^Text^`	`<sup>Text</sup>`
Subscript	`~Text~`	`<sub>Text</sub>`
Strikethrough	`~~Text~~`	`<del>Text</del>`

Install

This project can be installed via composer:

composer require cradeq/commonmark-strikethrough-sub-sup-extension

Usage

use Cradeq\CommonMark\StrikethroughSubExtension;
use Cradeq\CommonMark\SupExtension;
use League\CommonMark\Environment\Environment;
use League\CommonMark\Extension\CommonMark\CommonMarkCoreExtension;

$environment = new Environment();
$environment->addExtension(new CommonMarkCoreExtension);
$environment->addExtension(new StrikethroughSubExtension);
$environment->addExtension(new SupExtension);

cradeq/commonmark-strikethrough-sub-sup-extension 适用场景与选型建议

cradeq/commonmark-strikethrough-sub-sup-extension 是一款基于 PHP 开发的 Composer 扩展包，目前已累计 122 次下载、GitHub Stars 达 0，最近一次更新时间为 2026 年 02 月 10 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：「markdown」「extension」「sub」「subscript」「commonmark」「strikethrough」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 cradeq/commonmark-strikethrough-sub-sup-extension 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 cradeq/commonmark-strikethrough-sub-sup-extension 我们能提供哪些服务？

定制开发 / 二次开发

基于 cradeq/commonmark-strikethrough-sub-sup-extension 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

与 cradeq/commonmark-strikethrough-sub-sup-extension 相关的其它包

同方向 / 同关键字的高下载量 PHP Composer 包推荐，方便对比选型：

dg/texy 159

Texy converts plain text in easy to read Texy syntax into structurally valid (X)HTML. It supports adding of images, links, nested lists, tables and has full support for CSS. Texy supports hyphenation of long words (which reflects language rules), clickable emails and URL (emails are obfuscated again

myerscode/laravel-sub-request 7

A helper and facade for making internal API sub requests to your application

geertw/yii2-translatable-url-rule 14

A custom URL rule class for Yii 2 which allows to create translated URL rules

slavkovrn/yii2-imagecarousel 5

The Yii2 extension uses jQuery jquery.carousel-1.1.min.js and makes image carousel from php array of structure defined.

t3brightside/gallerycontent 0

TYPO3 CMS extension to create gallery content element with preset crop ratios and pagination

egorov/yii2-uikit 0

UI Kit 3 Extension for Yii2