问题描述
我想使用正则表达式来验证用户输入的文本.
I want to use regular expression which validate the text which user enter.
/^[a-zA-Z0-9 ]+$/
通过上面的行，我们只能允许字母、数字和空格.
By above line, we can allow only Alphabetic, Numbers and Space.
什么是正则表达式允许:
What will be regular expression to allow:
字母，
数字，
空间，
期间.
连字符 -
感叹号！
问号?
引号
alphabetic,
numbers,
space,
period .
hyphen -
exclamation mark !
question mark ?
quotes "
除了以上字符用户不能输入其他字符.
Except above characters user can not enter other characters.
谢谢，小白兔
推荐答案
大功告成.试试这个:
/^[a-zA-Z0-9 .!?"-]+$/
请注意，- 字符的位置很重要.如果它出现在两个字符之间(例如 a-z)，则表示一个字符范围.如果它出现在字符类的开头或结尾(或者如果它被转义)，它代表一个文字连字符.
Note that the position of the - character is important. If it appears between two characters (e.g. a-z) it represents a character range. If it appears in at the beginning or end of the character class (or if it's escaped) it represents a literal hyphen character.
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