Hi Jonathan,
Thank you very much for your reply. I check your script, it did not work: for example:
Suppose I give the string "abc", "abc123" "123" "abc_123" "abc.123": The string
"abc", "abc123", "123", "abc-123" should be legal, but the "abc.123" should be NOT
legal. I am using perl script to open user account, and check if user ID are legal or
not. I just allow user ID include letters, numbers and underscore(_), excluding all
other characters such as: !@#$%^&*(): all these stuff.
But use script: if ($str =~ /[A-Za-z0-9\_]+/) { print "legal"; } else {print
"Illegal";} It will print "Legal" with all the strings "abc" "abc123" "123" "abc_123"
"abc.123"
Thanks again.
Grace
Jonathan Daugherty <[EMAIL PROTECTED]> wrote:# Hello, I want to input a string
which is used to create file name on unix. and I want to allow input string to consist
of letters(A-Z, or a-z) and numbers(0-9) and underscroe( _ ) within file name.
#
# Does anoybody know how to check the input string legal or not?
# note: the following does not permit empty names.
if ($input =~ /[A-Za-z0-9\_]+/) {
# create file
} else {
# report error
}
--
Jonathan Daugherty
http://www.cprogrammer.org
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