username & password

I have created two arrays one for username and the other for password as shown below:

@username=("ABC","DEF","GHI");
@password=("101","102","103");

During the register proces the user is then given a username and password from above.

They then have to enter their username and password into a form which then gets the appropriate pl file to check whether the username and password is valid by checking what the user has entered in the form to what is entered in the array if their is a match then the user gains access to the system if not then they dont.

The form uses the get method so the Query_string is within $FORM_DATA.

The code I have typed in at the moment does not produce any errors but doesnt work properly the incorrect username keeps coming up:
here is the code:

The $username is trying to refer to the array.  The username is the name of the field in the HTML form.

if (exists $username{$FORM_DATA{'username'}}) {
      print"Correct password<BR>";
}
else {
print "Incorrect username","\n";
}

Any help will be greatly appreciated, or any alternative's to the above code.

Thank you.

email to:anne.smith@lineone.net
annesmithAsked:
Who is Participating?
 
sniperrusCommented:
Sorry a quick error fix:

if ($form{password} eq $hash{$form{username}})
{
print"Correct password<BR>";
}
else {
print "Incorrect username","\n";
}


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sniperrusCommented:
For starters, why use two arrays, this seems like it's crying for a %Hash. If you create a hash table with the user names as the keys and the passwords as the values then you can simply check

if ($password eq $hash{$username})
{
print"Correct password<BR>";
}
else {
print "Incorrect username","\n";
}

it's also faster than exists.
0
 
sniperrusCommented:
sniperrus changed the proposed answer to a comment
0
 
ozoCommented:
@hash{@username} = @password;
0
 
annesmithAuthor Commented:
Thank you very much sniperrus.  That code you specified works a treat.  Excelllent.  Thanks very much for your help.

Anne.
0
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