Reg ex僅允許使用表單輸入字段的字母數字和其他特殊字符？

Question

大家好我只允許用戶在表單字段如a-z，A-Z，0-9， - ，&和_中僅允許某些字符。

我在正則表達式很差。會是怎樣的正則表達式函數來檢查字符串是否包含比使用jQuery

Answer 1

試試這這些字符其他：

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

而且在使用中：

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

Example fiddle

Answer 2

只是這

^[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^[\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 3

你可以這樣做：

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

並對其進行測試，如：

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

Answer 4

可以使用\w爲字母，數字和下劃線：

^[\w&-]+$