From a legal viewpoint, I don't think you should modify any data or 
files on the clients computer. Code which simply times out (i.e. stops 
working but takes no other action) seems more acceptable.


PHPCoder wrote:

> Hi
> I have a funny request; I wrote a system for a client and am rather 
> concerned that I am not going to receive payment for the work done. 
> They want me to hand over the code before they are willing to pay, so 
> basically I will be left at their mercy; if they don't pay, they will 
> still have a working version of the system...
> So, is there any way I can inconspicuously code in some boo-boo's that 
> are time related etc. Something that will bomb the mysql tables or 
> break some code if it is not "unlocked" within a month etc.
> I'm not sure if people out tjere might have existing safeguard tools 
> etc, so I'm open for suggestions.
> PS, I know about Zend's encrypter, but since it will live on their 
> server, I don't think it will help much since they will need the 
> decrypter on there anyway right?
> Thanks

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