Question

I have the following PHP which basically gets the result of a MySQL query:

$q2 = "SELECT FIELD FROM TABLENAME WHERE ID = 1;";
$con = new mysqli($server, $user, $pass);
if (mysqli_connect_errno()) 
{
    $error = mysqli_connect_error();
    exit();
}
else
{   
    $res = mysqli_query($con, $q2);
    if ($res)
    {   
        while($row = mysqli_fetch_assoc($res))
        {
            PRINT "THERE WAS A RESULT HERE: "; 
        }
    }
    else
    {
        $error = mysqli_error();
        exit();
    }
    mysqli_free_result($res);   
};
mysqli_close($con);

But on occasions, it will return an empty value. This is valid, based on how the parent application works, but how can I detect that empty row and return “THIS WAS AN EMPTY ROW: “?

Answer 1

You might want to look up mysqli_num_rows() in the PHP manual. It lets you see how many rows are in a result set generated by the previous query. You can use the row count to determine whether to display results or the “no matching results” message.