在进行注册检查之前，用户是否已登录

Question

i wanted to check either the user is signed in or not before doing registration. here is my code in below

if (isset($_SESSION['Username'])){
                        $query_ins="insert into scholarship values('$firstname','$lastname','$username','$idnumber','$gender','$dateofbirth','$number','$email','$class','$schoolname','$fund','$reason')";
                    $query3=mysqli_query($con,$query_ins);
                    echo '<script type="text/javascript"> alert("Form is filled we will contact you soon") </script>';
                    }

                    else{
                        echo '<script type="text/javascript"> alert("You need to login first") </script>';
                    }
            }

Answer 1

Looks like the Username var might be existing but empty. try something like this:

if (isset($_SESSION['Username']) && $_SESSION['Username']!=''){
    $query_ins="insert into scholarship values('$firstname','$lastname','$username','$idnumber','$gender','$dateofbirth','$number','$email','$class','$schoolname','$fund','$reason')";
    $query3=mysqli_query($con,$query_ins);
    echo '<script type="text/javascript"> alert("Form is filled we will contact you soon") </script>';
}else{
    echo '<script type="text/javascript"> alert("You need to login first") </script>';
}

You could also use

if (isset($_SESSION['Username']) && !empty($_SESSION['Username']))