Question

What is wrong?

if($_GET['data']) && ($_GET['kullaniciadi'])  {
print '--''; }
else
print '--';

two is not possible to query?

Answer 1

You have messed up your parentheses. Try this:

if($_GET['data'] && $_GET['kullaniciadi']) {
    //Do stuff
}

The parentheses are for the if statement, not each condition. The conditions to be evaluated go inside. In your case you have 2 conditions, and the if will execute if both are evaluated to true.

If you do need to put the conditions inside parentheses too, make sure they balance:

if(($_GET['data']) && ($_GET['kullaniciadi'])) {
    //Do stuff
}

Also note that by changing that in your code above, it still won’t work. You have an extra single quote in the print of your if block. Change it to be the same as the one in your else block.