PHP mysqli_field_seek() Function

<?php//from  ja v  a2 s  . c om
$con=mysqli_connect("localhost","my_user","my_password","my_db");

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

$sql="SELECT name FROM emp";

if ($result=mysqli_query($con,$sql)){
  // Get field info for 1st column ("Lastname")
  mysqli_field_seek($result,0);
  $fieldinfo=mysqli_fetch_field($result);

  print $fieldinfo->name;
  print $fieldinfo->table;
  print $fieldinfo->max_length;

  // Free result set
  mysqli_free_result($result);
}

mysqli_close($con);
?>