Aaron Reist wrote:
From: "John W. Krahn" <[EMAIL PROTECTED]>
Aaron Reist wrote:
Currently I have a simple program takes a username from a html
textbox and checks against a list of values in a notepad document.
If the name is found the user is given access, if not they are
prompted to try again.
What I am trying to do now is have the program check the username
format BEFORE it checks against the list.
The program will check for two types of usernames - the first is
#xxxxxxx# (9 alphanumeric characters. beginning and ending with a
number)....the second is XxxxxxxxxxX (11 alphanumeric charactors, the
first and last character in this case will always be a letter) When
this second format is encounterd the program must remove the leading
and ending letters and leave me with the 9 characters in the center.
is this somthing I should use the split function for?
any suggestions or examples would be greatly appreatiated.
You could use a regular expression to do that.
my $input = get_input_from_user();
$input =~
/\A(?:[[:alpha:]]([[:alnum:]]{9})[[:alpha:]]|(\d[[:alnum:]]{7}\d))\z/
and my $username = $+;
> The code you provided looks great, unfortunatly my knowledge of regular
> expressions is limited.
>
> Do you know of any webpages or tutorials that would help me construct
> regular expressions like the one you provided?
The best tutorial is this book:
http://www.oreilly.com/catalog/regex2/
Perl also includes four documents on regular expressions:
perldoc perlrequick
perldoc perlretut
perldoc perlre
perldoc perlreref
Also available on the web at:
http://perlpod.com/5.8.4/pod/perlrequick.html
http://perlpod.com/5.8.4/pod/perlretut.html
http://perlpod.com/5.8.4/pod/perlre.html
http://perlpod.com/5.8.4/pod/perlreref.html
John
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