try mo to angtagal na, sigurado master mo na ngayon php pero eto padin since wala pa sumasagot haha.
if(isset($_POST['save'])){
$fn = real_escape_string($dbcon,$_POST['name']);
$ln = real_escape_string($dbcon,$_POST['position']);
$sn = real_escape_string($dbcon,$_POST['office']);
$counter="select Name from tbl_employee where Name='$fn'";
$con_counter=mysqli_query($dbcon,$counter);
$check=mysqli_num_rows($con);
if($check==1)
{
echo"Employee already exist!";
}
else{
$emp_table="INSERT INTO tbl_employee (Name,Position,Office) VALUES('$fn','$ln','$sn')";
mysqli_query($dbcon,$emp_table);
echo"successfully recorded!";
}
}
sir yung $con yata dapat $con_counter