Deprecated: Constant FILTER_SANITIZE_STRING is deprecated

PHP版本切换到8.2后，字符串安全过滤函数filter_var报错，报错内容：Deprecated: Constant FILTER_SANITIZE_STRING is deprecated，意思FILTER_SANITIZE_STRING常量已弃用，搜索了一下原来是在PHP8.1的时候就已经弃用了，解决办法将FILTER_SANITIZE_STRING替换为FILTER_UNSAFE_RAW 即可。