Why does this pregmatch pattern return true on a number input?

Question

I know this is very basic for some, but this got my head scratching. why does this pattern

/[!@#$%^&*()+|.*-<>\'`]/ 

return true on a number input ie abcd123. tested it on this tester

Answer 1

您需要转义破折号，否则将其解释为字符范围\\x2A-\\x3E ：

/[!@#$%^&*()+|.*\-<>\'`]/ 

Answer 2

这是因为-在您的正则表达式中签名。

Answer 3

You have to backslash the "-", like this :

/[!@#$%^&()+|.\-<>\'`]/

I think you should backslash all special char too.