26669Securing Clickbank with PHPhttp://www.chauy.com/2005/12/securing-clickbank-with-php/Here?s a way to protect the products you sell with Clickbank, using their built-in protection and by implementing a 30-day expiration, all without having to worry about managing databases or customer lists.PHP > Tips and Tutorials > SecurityOct 16, 2006dotcomguy
This password protection is rather simple. I wouldn't advise you to use this for any major admin panels. Just keep it cool as there may be a exploit to bypass this.
There's no point to think of the importance of validating your visitor's input. A very important aspect of this process is credit card validation. How do you spot if the entered value is a valid credit card number? There are 2 reasons for doing this and there are 2 ways of doing it.
The regular expression, as a pattern, can match all kinds of text strings helping your application validate, compare, compute, decide etc. It can do simple or very complex string manipulations. The list of possibilities is enormous when it comes to what you can achieve using regular expressions. You can take any phrase that starts with an "A" or any character and do various things with it. You can match phone numbers, email addresses, url's, credit card numbers, social security numbers, zip codes, states, cities.....(the list never ends). A huge script that is supposed to validate a user input and prepare it for sql can be reduced to only one line with the help of preg_replace.
Captcha stands for "Completely Automated Public Turing test to tell Computers and Humans Apart" and is used for telling humans and computers apart. Many times, web sites will use Captcha on forms on forms to make sure the form is being filled out by a human. This tutorial will show you how to create a form with Captcha.
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