TYPO3从11.5升级到12.4时composer依赖冲突（psr/http-message）

正在将TYPO3网站从11.5版本升级到12.4版本，已解决PHP版本问题（修改了composer.json和Docker配置并重启容器），但在Docker内执行composer update --dry-run时出现依赖冲突，具体错误信息如下：

typ/toolbox/bc-docker.sh call_composer update --dry-run
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires t3g/blog ^12.0.2 -> satisfiable by t3g/blog[12.0.2].
    - t3g/blog 12.0.2 requires psr/http-message ^1.0 -> satisfiable by psr/http-message[1.0, 1.0.1, 1.1].
    - You can only install one version of a package, so only one of these can be installed: psr/http-message[1.0, 1.0.1, 1.1, 2.0].
    - tomasnorre/crawler 12.0.4 requires psr/http-message ^2.0 -> satisfiable by psr/http-message[2.0].
    - Root composer.json requires tomasnorre/crawler ^12.0.4 -> satisfiable by tomasnorre/crawler[12.0.4].

Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.

冲突原因是t3g/blog 12.0.2依赖psr/http-message ^1.0，而tomasnorre/crawler 12.0.4依赖psr/http-message ^2.0，两者无法共存。原本期望Composer自动解决冲突，但担心使用-W选项会影响其他依赖。

当前composer.json的require部分内容如下：

"require": {
        "typo3/minimal": "^12.4.0",
        "typo3/cms-belog": "^12.4.0",
        "typo3/cms-beuser": "^12.4.0",
        "typo3/cms-fluid-styled-content": "^12.4.0",
        "typo3/cms-impexp": "^12.4.0",
        "typo3/cms-indexed-search": "^12.4.0",
        "typo3/cms-info": "^12.4.0",
        "typo3/cms-lowlevel": "^12.4.0",
        "typo3/cms-redirects": "^12.4.0",
        "typo3/cms-rte-ckeditor": "^12.4.0",
        "typo3/cms-scheduler": "^12.4.0",
        "typo3/cms-seo": "^12.4.0",
        "typo3/cms-setup": "^12.4.0",
        "typo3/cms-tstemplate": "^12.4.0"
}

解决方案建议 #

• 优先检查扩展更新：查看t3g/blog是否有高于12.0.2的版本，支持TYPO3 12.4同时兼容psr/http-message ^2.0。如果存在这类版本，修改composer.json中t3g/blog的版本约束为更高范围（比如^12.0），再重新执行composer update --dry-run。
• 评估-W选项的影响：先执行composer update --dry-run -W，查看命令输出中会被升级、降级或移除的包列表。如果只有psr/http-message和相关冲突扩展的版本调整，且不影响TYPO3核心包或其他业务依赖，再实际执行带-W的更新命令。
• 临时替代方案：如果t3g/blog暂无兼容psr2的版本，可考虑暂时禁用该扩展（业务允许的情况下），或者查找社区提供的兼容补丁，待扩展更新后再重新安装。

内容的提问来源于stack exchange，提问作者user26875548