while($row = mysqli_fetch_assoc($result))
        {
    $gender = $row['gender'];
    $output.= "Gender: <select name='gender'>
<option value='0' ".if ($gender != 'M' || $gender !='F') { echo ('selected="selected"');}.">Select gender</option>
<option value='M' ". if ($gender == 'M') { echo ('selected="selected"');}.">Male</option>
<option value='F' ". if ($gender == 'F') { echo ('selected="selected"');}.">Female</option></select>"
    }

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