Выпадающий список и база

<?
function children($year) {$SQL = "SELECT * FROM `schools_klasi` WHERE `year` = '".$year."' > 1990 AND `year` = '".$year."' < 2000"; $result = mysql_query($SQL);
return $result;}
function children_schools($year,$iFrom, $iTo) {
    $sContent = '<select name="'.$year.'">'; 
    for($i=$iFrom;$i<=$iTo;$i++) {
       $sContent .= '<option value="'.$i.'">'.$i.'</option>'; 
    }
    $sContent .= '</select>';
    return $sContent; 
}
if(isset($_POST['from']) && isset($_POST['to'])) {
    $from = $_POST['from'];
    $to = $_POST['to'];
    }
    $arResult = children_schools($year);
    while($row = mysql_fetch_assoc($arResult)) {echo $row['last_name']. " ". $row['name'] . " ". $row['ochestvo'] . ", родился - ".$row['year'] . " года". $row['mesets_day'] . "</br>";}
?>
<form action="" method="post" name="form_test">
От: <?=children_schools('from', 1990, 2000);?> <br />
До: <?=children_schools('to', 1990, 2000);?> <br />
<input type="submit" value="Отправить данные">
</form>

$arResult = children_schools($year);

$arResult = children_schools($year,$from,$to);

<?php
error_reporting(E_ALL);
?>
<form action="" method="post" name="form_test">
От: <?php HtmlGenerateList('from', 1989, 2001);?> <br />
До: <?php HtmlGenerateList('to', 1995, 2001);?> <br />
<input type="submit" name="button" id="button" value="Вывести">
</form>
<?php
function HtmlGenerateList($year,$iFrom, $iTo) {
    $sContent = "<select name=".$year.">";
    for($i=$iFrom;$i<=$iTo;$i++) { 
       $sContent .= "<option value=".$i.">".$i."</option>"; 
    }
    $sContent .= "</select>"; 
    echo $sContent; 
}
 
 
if ((isset($_POST['from'])) && (isset($_POST['to'])))
    {
         $SQL = "SELECT * FROM `schools_klasi` WHERE `year`>'".$_POST['from']."' and `year`<='".$_POST['to']."'"; 
         $result = mysql_query($SQL);
         for ($i=0;$i<=mysql_num_rows($result);$i++)
              {
                $r=mysql_fetch_array($result);
                echo $r['name'];
                mysql_query($sql) or die(mysql_error());
              }
        return $result;
    }
?>

<?php
$from="<select name='from'>";
for ($i=1989;$i<=2001;$i++)
{
$from=$from."<option value='".$i."'>".$i;
}
$from=$from."</select>";
$to="<select name='to'>";
for ($i=1989;$i<=2001;$i++)
{
$to=$to."<option value='".$i."'>".$i;
}
$to=$to."</select>";
?>
<form action="" method="POST">
От: <?php echo $from; ?> <br />
До: <?php echo $to;?> <br />
<input type="submit" name="button" id="button" value="Вывести">
</from>
<?php
if (isset($_POST['button']))
{
//сюда соединение с БД
$from=$_POST['from'];
$to=$_POST['to'];
$SQL = "SELECT * FROM `schools_klasi` WHERE `year`>'".$from."' and `year`<='".$to."'"; 
         $result = mysql_query($SQL);
         for ($i=0;$i<=mysql_num_rows($result);$i++)
              {
                $r=mysql_fetch_array($result);
                echo $r['name'];
                mysql_query($sql) or die(mysql_error());
              }
}
 
?>