Regex help! Only numbers and "/"

[hannibal]

Hi

 

I have some code whihc I am trying to exclude several characters:

 

if (!preg_match("/^([a-z0-9._-](\+[a-z0-9])*)", $_POST["code"])){

    // Raise error message = FAIL

} else {

    // We are A OK.

}

 

In fact, all I want the user to be able to submit are "0-9a-z/_" (i.e. no spances, or dots or other special characters). I want to also esure that the first character is not a "/".

 

But it always fails if I have "/" in my code and I cannot understand why.

 

Any ideas anyone? Thanks in advance.

 

H.

[effigy]

But it always fails if I have "/" in my code and I cannot understand why.

 

Because you're using / as your delimiter. Either escape it, \/, or change the delimiter.

 

%\A(?!/)[\w/]+\z%

 

[hannibal]

Excellent - Works a charm, thank you very much.

 

Doh! Can't believe it was as simple as changing the delimiter.

 

Many many thanks.