can anyone help me to solve my query? I want to execute php unlink command which is store in DB. For example:
?php echo eval("?>".unlink('abc.txt')."<?") ?>
Please
?> is a closing PHP tag, and <? is a short open PHP tag, so at a minimum, you have those backwards.
In your code, you don't need these PHP tags at all. They are meant for the parser, not for eval(), which is already in PHP mode.
The best thing to do is not store this sort of thing in your database. I can't think of a single reason why you would put PHP code in your database values. You should instead have that file name, and then run a for loop over the results to unlink.
Basically, your entire solution is broken. You can start by removing those backwards PHP tags and it will work... but is that really what you want? Probably not.