David Buddrige wrote:
>
> Alex Cheung Tin Ka wrote:
> >
> > Could anyone tell me how to make a regular expression for match a string only
>[a-z0-9] ?
>
> [a-z0-9]+ will match a sequence of characters containing one or more of
> the set [a-z0-9].
>
> If you want to match a line of characters tha
Correction: That should be [a-z0-9]+. (note the plus)
-Original Message-
From: Timothy Johnson
To: 'Alex Cheung Tin Ka '; '[EMAIL PROTECTED] '
Sent: 11/13/02 12:01 AM
Subject: RE: match only a-z or 0-9
You've essentially already done it. [a-z0-9] is a char
You've essentially already done it. [a-z0-9] is a character class that
includes all characters within that range. So something like this would
work:
if($string =~ /^[a-z0-9]$/){
print "It's only letters and digits.\n";
}else{
print "There's something else in there.\n";
}
-Original Mes
[a-z0-9]+ will match a sequence of characters containing one or more of
the set [a-z0-9].
If you want to match a line of characters that contains NOTHING BUT
[a-z0-9] then you could use:
^[a-z0-9]+$
If you want to match a sequence of characters that must start with [a-z]
and contain any number
