RegEx experts needed

[LawsHosting]

I'm in need of some RegEx help. I'm looking to validate fields, but only allow

[a-z][0-9],* and @

I'm no good to RegEx, however G searches gave me this:

/[\'\/~`\!#\$%\^&£(\)_\-\+=\{\}\[\]\|;:\"\<\>,\.\?\\\]/

Is this ok, or is there a simpler way?

 

[scsi]

What are you validating? What is the input for email or something?

What programming language?

Give examples of input.

 

[LawsHosting]

For DNS Records, PHP

eg. the host part for A record can only be [a-z], [0-9], * or @.... So, if someone puts a ( as a host, then, it'll error to the API.

I can't use javascript as this is a plug-in for commercial software I'm helping with - so it needs to be validated after submission.

PS. This isn't DA related btw

 

[scsi]

Maybe something as simple as:

/^[a-zA-Z*@]+$/

There are alot of online regex testers and examples for different things.

http://nenuno.co.uk/creative/design/10-online-regular-expression-testers/

Stackoverflow would be a good place to find regex examples as there are a lot of experts on there.

 

[LawsHosting]

Well /^[a-zA-Z0-9*@]+$/ worked. So simple.