I have created paypal cart in sandbox which give a html code like
<input type="hidden" name="cmd" value="_s-xclick">
It is said that if i have to update value dynamically, i have to chage the code as follows
<input type="hidden" name="cmd" value="_cart">
My issue is if i do so then the php code given by paypal does not executes in my website, else it does. what is the issue, please help.