Short form of if/else condition for my scenario

I want to know the short form of this my php if / else condition.

if(isset($_POST['name']) && strlen($_POST['name']) > 0)
{
    $name = addslashes($_POST['name']);
}
else
{
    $name = '';
    $flag = '0';
}

i have made this.. but this is not valid for $flag

$name = (isset($_POST['name']) && strlen($_POST['name']) > 0 ? addslashes($_POST['name']) : ''); // returns true