使用正则表达式可以检查一个字符中是否包涵一个大写字母： $text1 = 'this is all lower-case' $text2 = 'this is NOT all lower-case' $text1 -cmatch '[A-Z]' $text2 -cmatch '[A-Z]' 结果将返回”true”或”false” 反过来检查是否包含小写，可以尝试这样： $text1 = 'this is all lower-case' $text2 = 'this is NOT all l