Unable to delete the rows from the database

[sawyerford]

Hi,

  I have created a table named multipath with database name "mydatabase".. I have created a table to store the data in the tables. Check boxes are created to select one row each to delete. But I am unable to delete the rows. Why??

 

Here's my PHP code

 

<?php
$host="localhost"; // Host name
$username="root"; // Mysql username
$password=""; // Mysql password
$db_name="mydatabase"; // Database name
$tbl_name="multipath"; // Table name

// 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);

?>
<table width="400" border="0" cellspacing="1" cellpadding="0">
<tr>
<td><form name="form1" method="post" action="">
<table width="400" border="0" cellpadding="3" cellspacing="1" bgcolor="#CCCCCC">
<tr>
<td bgcolor="#FFFFFF"> </td>
<td colspan="4" bgcolor="#FFFFFF"><strong>Delete multiple rows in mysql</strong> </td>
</tr>
<tr>
<td align="center" bgcolor="#FFFFFF">#</td>
<td align="center" bgcolor="#FFFFFF"><strong>Path ID</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Path</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"><?php echo $rows['path_id']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['path']; ?></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete"></td>
</tr>
<?
// Check if delete button active, start this
if($delete){
for($i=0;$i<$count;$i++){
$del_id = $checkbox[$i];
$sql = "DELETE FROM $tbl_name WHERE id='$del_id'";
$result = mysql_query($sql);
}

// if successful redirect to delete.php
if($result){
echo "<meta http-equiv=\"refresh\" content=\"0;URL=delete.php\">";
}
}
mysql_close();
?>
</table>
</form>
</td>
</tr>
</table>

 

Please u can reply me at sawyerford007ATgmail DOTcom

[Vitamin]

Try and echo the variables in question to make sure they are what you expect.

[brianlange]

after mysql_query($sql) add an or statment.

mysql_query($sql) or die(mysql_error());

 

If there's something wrong with your sql you'll receive a message about it.

[johnsmith153]

I don't see where you set $delete. Are you trying to execute this part of the script when you press the delete submit button?

[sawyerford]

Thanks all to the reply:

 

@Vitamin and @brianlange : the echo variables print the values successfully in the table.. I am not getting what's the error, and Why am I failing to delete the rows

 

@JohnSmith: Yes may be I am unable to delete because the $delete is not set..

I am a newbie to PHP and HTML and its taking time for me to do. Can you please create a table and try to delete the rows with the same code.. you will come to know what happens

 

I have a screen shot uploaded which shows an PHP snippet displayed with the table.. is the the problem occuring due to it??

 

 

 

[attachment deleted by admin]

[Vitamin]

Though I don't general do homework for people.  As you just said $delete is not set but you do a if statement on it.

 

Therefor you will not run through that for loop and that is where delete query is.

[Pikachu2000]

You have a short open tag in the code below. Change it to the full <?php open tag and see if that makes any difference.

 

</tr>
<?
// Check if delete button active, start this