【疑难】阿里云安装composer报错

Downloading https://mirrors.aliyun.com/composer/p2/symfony/polyfill-php72.json if modified
Reading /root/.cache/composer/repo/https---mirrors.aliyun.com-composer/provider-symfony~polyfill-php70.json from cache
Downloading https://mirrors.aliyun.com/composer/p2/symfony/polyfill-php70.json if modified
Reading /root/.cache/composer/repo/https---mirrors.aliyun.com-composer/provider-symfony~polyfill-ctype.json from cache
Downloading https://mirrors.aliyun.com/composer/p2/symfony/polyfill-ctype.json if modified
[304] https://mirrors.aliyun.com/composer/p2/symfony/polyfill-php70.json
[304] https://mirrors.aliyun.com/composer/p2/symfony/polyfill-ctype.json
[304] https://mirrors.aliyun.com/composer/p2/symfony/polyfill-intl-normalizer.json
[304] https://mirrors.aliyun.com/composer/p2/symfony/polyfill-php72.json
[304] https://mirrors.aliyun.com/composer/p2/psr/http-factory.json
Reading /root/.cache/composer/repo/https---mirrors.aliyun.com-composer/provider-paragonie~random-compat.json from cache
Downloading https://mirrors.aliyun.com/composer/p2/paragonie/random_compat.json if modified
[304] https://mirrors.aliyun.com/composer/p2/paragonie/random_compat.json
Built pool.
Running pool optimizer.
Pool optimizer completed in 0.012 seconds
Found 529 package versions referenced in your dependency graph. 371 (70%) were optimized away.
Updating dependencies
Generating rules
Resolving dependencies through SAT
Looking at all rules.
Something's changed, looking at all rules again (pass #1)
Dependency resolution completed in 0.001 seconds
Reading /root/.cache/composer/repo/https---mirrors.aliyun.com-composer/provider-alibabacloud~darabonba-openapi.json from cache
Your requirements could not be resolved to an installable set of packages.

是安装阿里云sdk的

检查php版本是否选错了，网站页面--php版本可以切换

不是，和php版本没有关系