$labels = array ('first_name' => 'First Name: ','middle_name' => 'Middle Name: ','second_name' => 'Second Name: ','tel' => 'Tel: ');

if(count($_POST) ==  0) {

echo '<form action="'.$_SERVER['PHP_SELF'].'" method="post"><table>';
foreach($labels as $field => $value)
{
        echo '<tr><td>'.$value.'</td><td><input type="text" name="'.$field.'" size="15"></td></tr>';
}
echo '</table><input type="submit" value="Sumit">';
echo '</form>';
exit();


} else {
foreach($_POST as $field => $values)
{
        if($field != 'middle_name')
        {
                if($value == '')
                {
                        $blank_array[] = $field;
                }
        }
}
if(sizeof($black_array) > 0)
{
        echo '<b>You didn\'t fill in one or more required fields. You must enter:<br>';
        foreach($blanck_array as $value)
        {
        echo $value.'<br>';
        }
        echo '<table border="1"><form action="'.$_SERVER['PHP_SELF'].'" method="post">';
        foreach($labels as $field => $value)
        {
        $good_data[$field] = strip_tags(trim($_POST[$field]));
                echo '<tr><td>'.$labels[$field].'</td><td><input type="text" name="'.$field.'" size="15" maxlength="15" value="'.$good_data[$field].'"></td></tr>';
        }
        echo '</tabble><input type="submit" value="Sumit">';
        echo '</form>';
        exit();
}

}
?>