JavaScript正则表达式的建议(Advice with JavaScript Regular Expression)

JavaScript正则表达式的建议(Advice with JavaScript Regular Expression)

我试图写一个正则表达式，其中：

仅以字母开头 仅包含字母和数字 不超过32个字符的长度

我到目前为止是：

^[a-zA-Z][0,31]+$

但我不确定这是否正确。

I'm trying to write an regular expression where:

Starts with letters only Contains only letters and numbers No more than 32 characters in length

what I have so far is:

^[a-zA-Z][0,31]+$

but I'm not sure if this would be correct.

最满意答案

这应该工作：

/^[a-z][a-z0-9]{0,31}$/i ^和$匹配字符串的开头和结尾。 [az]匹配一个字母。 [a-z0-9]{,31}最多可匹配31个字母和数字。 i让你的正则表达式不区分大小写。

This should work:

/^[a-z][a-z0-9]{0,31}$/i ^ and $ match the beginning and end of the string. [a-z] matches a letter. [a-z0-9]{,31} matches up to 31 letters and numbers. i makes your regex case-insensitive.