Can't delete multiple rows from database with checkbox PHP - php

Question

I'm learning php, now I'm trying to get use with databases and etc stuff. My code (that is below) seems that is not working, and I can't solve it out why. It looks good but still after pushing "delete" nothing happens. Maybe you will be able to help me. Thanks in advance.
<?php
$host="localhost";
$username="root";
$password="";
$db_name="zurnalas";
$tbl_name="zurnalas";
// Connect to server and select databse.
mysql_connect("$host", "$username", "$password")or die("cannot connect");
mysql_select_db("$db_name")or die("cannot select DB");
$sql="SELECT * FROM $tbl_name";
$result=mysql_query($sql);
$count=mysql_num_rows($result);
?>
<form name="form1" method="post" action="">
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<td><form name="form1" method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]); ?>">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF"> </td>
<td colspan="4" bgcolor="#FFFFFF"><strong>Žurnalų trinimas iš duomenų bazės</strong> </td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">#</td>
<td align="center" bgcolor="#FFFFFF"><strong>Id</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Pavadinimas</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Kiekis</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Leidykla</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Metai</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Kaina</strong></td>
</tr>
<?php
while($rows=mysql_fetch_array($result)){
?>
<tr>
<td align="center" bgcolor="#FFFFFF"><input name="checkbox[]" type="checkbox" id="checkbox[]" value="<? echo $rows['id']; ?>"></td>
<td bgcolor="#FFFFFF"><? echo $rows['id']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['pavadinimas']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['kiekis']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['leidykla']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['metai']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['kaina']; ?></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="delete"></td>
</tr>
<?php
// Check if delete button active, start this
if($_POST['delete']){
$checkbox[] = $_POST['checkbox[]'];
for($i=0;$i<$count;$i++){
$del_id = $checkbox[$i];
$sql = "DELETE FROM $tbl_name WHERE id='$del_id'";
$result = mysql_query($sql);
}
if($result){
echo "<meta http-equiv=\"refresh\" content=\"0;URL=trinti.php\">";
}
}
mysql_close();
?>
</table>
</form>
</td>
</tr>
</table>

Answer 1

Your form's action field is empty. You have to get fields from form with php "$checkbox = $_POST['checkbox']". After you can do like you do, or you can write other mysql query " DELETE FROM YOUR_TABLE WHERE id in (1,2,3,4) ".