近期看到一个php漏洞问题，遂升级了服务器php到8，然后有个插件出问题了：Warning: preg_match_all(): Compilation failed: PCRE2 does not support \F, \L, \l, \N{name}, \U, or \u at offset

发现是该插件正则中 [\u4e00-\u9fa5]有问题，改为 [\p{Han}]后即可。