I have this regex: /[^a-zA-Z0-9_-]/
我有这个正则表达式:/[^ a-zA-Z0-9_ -]/
What I want to add to above is:
我想补充的是:
- first character can be only
a-zA-Z - 第一个字符只能是a-zA-Z
How I could make this regular expression?
我怎么才能写出这个正则表达式呢?
2 个解决方案
#1
28
Try something like this:
试试这样:
^[a-zA-Z][a-zA-Z0-9.,$;]+$
Explanation:
解释:
^ Start of line/string.
[a-zA-Z] Character is in a-z or A-Z.
[a-zA-Z0-9.,$;] Alphanumeric or `.` or `,` or `$` or `;`.
+ One or more of the previous token (change to * for zero or more).
$ End of line/string.
#2
7
I think this would also work
我想这也可以
^[a-zA-Z].*
If you wanted to test just the first character as being alphabetical and the rest of the string can be anything.
如果您想要测试第一个字符是按字母顺序排列的，其余的字符串可以是任何东西。
#1
28
Try something like this:
试试这样:
^[a-zA-Z][a-zA-Z0-9.,$;]+$
Explanation:
解释:
^ Start of line/string.
[a-zA-Z] Character is in a-z or A-Z.
[a-zA-Z0-9.,$;] Alphanumeric or `.` or `,` or `$` or `;`.
+ One or more of the previous token (change to * for zero or more).
$ End of line/string.
#2
7
I think this would also work
我想这也可以
^[a-zA-Z].*
If you wanted to test just the first character as being alphabetical and the rest of the string can be anything.
如果您想要测试第一个字符是按字母顺序排列的，其余的字符串可以是任何东西。