Question

大家好我只想在a-z，A-Z，0-9， - ，＆amp;等表单字段中允许用户使用某些字符。和_。

我在正则表达式上很穷。使用jquery

检查字符串是否包含除这些字符以外的正则表达式函数是什么

Answer 1

试试这个：

^[a-z0-9\-&_]+$/i

并在使用中：

/^[a-z0-9\-&_]+$/i.test(value); // = true|false

Example fiddle

Answer 2

您可以将\w用于字母，数字和下划线：

^[\w&-]+$

Answer 3

就是这个

  ^[A-Za-z0-9\-_&]+$

^ Start of string
Char class [A-Za-z0-9\-\_] 1 to infinite times [greedy] matches:
    A-Z A character range between Literal A and Literal Z
    a-z A character range between Literal a and Literal z
    0-9 A character range between Literal 0 and Literal 9
    \-_& One of the following characters -_&
$ End of string

甚至是^[\w\d\-_&]+$

^ Start of string
Char class [\w\d\-\_] 1 to infinite times [greedy] matches:
    \w Word character [a-zA-Z_\d]
    \d Digit [0-9]
    \-_& One of the following characters -_&
$ End of string

Answer 4

你可以这样做：

function isValid(str) {
    return (/^[a-zA-Z0-9_\-&]+$/gi).test(str);
}

并测试它：

console.log(isValid('aA0_-&'));   // true
console.log(isValid('test*'));    // false

正则表达式只允许使用表单输入字段的字母数字和其他一些特殊字符？

4 个答案: