When text with HTML tags inside it are inputted into a web-form (e.g
In the above statement % specifies
whitespace.its browser dependent ,some browser replaces whitespace with '%' and some with '+'
if you want to decode than you can do that by php function
the syntax of which is
string rawurldecode ( string $str ).
Now about querystring:
when you are sending your data via GET method,the data which you send is formed into "name=value" form and its goes to the server.
consider you have a form like this
<form method="get" action="a.php"> name:<input type="text" name="name"> </form>
and you insert name as rahul
then the query string will be "name=rahul" ,the value of which you can retreive in the server side using