There's a potential bug in your code that might affect you
down the road.
The bug would occur if you ended up with two usernames that
were identical, except for case, and the password was the same.
So, if you have a user 'foo' registered, but lets say he forgot
to capitalize his name, so he hit the back button and entered
'Foo' as the username with the same password.
Since MySQL comparisons with the '=' operator are case-insensitive,
your rows returned would be 2, which is != 1, so foo would
be locked out using either username.
Of course, you can get around this with careful attention
to detail on the input side. How you fix it depends on how
much leniency you want to give your users.
It's a rare situation, but one you should watch out for
when making username/password checking scripts with MySQL.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
| |
For: |
|
Use: |
| & | | & |
| < | | < |
| > | | > |
| [ | | [ |
| ] | | ] |
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.