Getting PHP error Warning: fputcsv() expects parameter 2 to be array

Question

I have mysql db with different tables. The data between the tables are linked and I retrieve and display them by using the userid. I used the reference from PHP MYS

Answer 1

Read the documentation

fputcsv should be array of values, you have a there string.

Answer 2

"Warning: fputcsv() expects parameter 2 to be array, string given inon line 17" is a very helpful message.

What that means is that in fputcsv($fp, $val);, $val is expected to be an array and it is not.

$val is an element of the $row array, so there's a problem with your query or the data in the database.

Answer 3

You have to give it an array so try it like this

    $con=mysqli_connect("localhost","root","","mytable");

    if (mysqli_connect_errno()) {
    echo "Failed to connect to MySQL: " . mysqli_connect_error();
        }


     $sql = "SELECT user_id FROM tbl_users";
      $users_profile_user_id = mysqli_query($con, $sql); 

      $fp = fopen("user_profile_id.csv", "w");

    while($row = mysqli_fetch_array($users_profile_user_id, MYSQLI_ASSOC)){
      fputcsv($fp, $row);
    }

    fclose($fp);