Форма выбора данных

<?php
 
$sql = "SELECT dol FROM vra";
$result_select = mysql_query($sql);
 
echo "<select name = 'Должность'>";
while($object = mysql_fetch_object($result_select)){
echo "<option value = $object->dol </option>";
}
echo "</select>";
?>

$sql = "SELECT dol FROM vra";
$result_select = mysql_query($sql);
 
echo "<select name = 'dol'>";//не желательно использовать кириллицу
while($object = mysql_fetch_array($result_select)){
$dol = $object['dol'];
echo '<option value ="'.$dol.'">"'.$dol.'"</option>';// тут неверный синтаксис был
}
echo "</select>";

$sql = "SELECT dol FROM vra";
$result_select = mysql_query($sql);
echo '<form method="post">'
'<select name = "dol">';
while($object = mysql_fetch_array($result_select)){
$dol = $object['dol'];
echo '<option value ="'.$dol.'">"'.$dol.'"</option>';
}
echo '</select>;
<input type="submit" name="submit" value="OK">
</form>';
if(isset($_POST['submit'])){
    $dol = $_POST['dol'];
    $sql = "SELECT dol, fio FROM vra WHERE dol = '$dol'";//исправьте названия столбцов на свои
    echo '<form method="post">
    <select name = "dol">';
    while($object = mysql_fetch_array($result_select)){
    $dol = $object['dol'];
    echo '<option value ="'.$dol.'">"'.$dol.'"</option>';
}
echo '</select>;
<input type="submit" name="submit" value="OK">
</form>';
}