Rows are not being deleted - php

Question

Here is my php code to select and delete rows form table:
<h1>Deleting Multiple Records using PHP & MySQL</h1>
<p> </p>
<?php
These are my db connection:
$host = "localhost"; // Host name
$username = "root"; // Mysql username
$password = ""; // Mysql password
$db_name = "project"; // Changed database name
$tbl_name = "users";
mysql_connect($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);
?>
Here is my html code to retrieve data from database:
<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>Id</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>First Name</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Last Name</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Gender</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Phone Number</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Experiance</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>User Name</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Password</strong></td>
</tr>
<?php while ($rows = mysql_fetch_array($result, MYSQL_ASSOC)) { ?>
<tr>
<td align="center" bgcolor="#FFFFFF">
<input name="checkbox[]" type="checkbox" id="checkbox[]" value="<? echo $rows['id']; ?>"></td>
<td bgcolor="#FFFFFF"><?php echo $rows['id']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['fname']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $rows['lname']; ?> </td>
<td bgcolor="#FFFFFF"><?php echo $rows['gend']; ?> </td>
<td bgcolor="#FFFFFF"><?php echo $rows['phone']; ?> </td>
<td bgcolor="#FFFFFF"><?php echo $rows['exp']; ?> </td>
<td bgcolor="#FFFFFF"><?php echo $rows['uname']; ?> </td>
<td bgcolor="#FFFFFF"><?php echo $rows['pwd']; ?> </td>
</tr>
<?php } ?>
<tr><td colspan="5" align="center" bgcolor="#FFFFFF">
<input name="delete" type="submit" id="delete" value="Delete" onclick="javascript:confirm('Are you sure to delete')"></td></tr>
<?php
if(isset($_POST['delete'])){
$checkbox = $_POST['checkbox'];
for($i=0;$i<count($_POST['checkbox']);$i++){
$del_id = $checkbox[$i];
$sql = "DELETE FROM $tbl_name WHERE id='$del_id'";
print $sql;
$result = mysql_query($sql);}
if($result){echo "<meta http-equiv=\"refresh\" content=\"0;URL=index.php\">";}}
mysql_close();
?>
</table></form></td></tr></table>
<p>Record count: <?php echo number_format($count) ?></p>*/
I tried many times but it not deleting a single row from table.
just now i changed the code of executing query....please check it and inform me...

Answer 1

What is this query
$sql = "DEFRE FROM users WHERE id in (" . implode(",", $deleteIds) . ") ";
??
For deleting you should do something like this
$sql = "DELETE FROM users WHERE id IN (" . implode(",", $deleteIds) . ") ";

Answer 2

In the code
if (isset($_POST['checkbox']) && count($_POST['checkbox']) > 0)
{
$deleteIds = $_POST['checkbox']; // it will be an array
$sql = "DELETE FROM users WHERE id in (" . implode(",", $deleteIds) . ") ";
// run the query
}
We need to see the actual code trying to "delete". The usual mysql_query($sql) won't work. You have to use mysql_exec() instead of mysql_query().
Update: Sorry, I was confusing another form of query. mysql_query("delete from table where (whatever)") should work, though it returns true on success or false on failure, not a rowset.

Answer 3

I deleted one line ID from my program and i got the answer and it's working fine.
<tr>
<td align="center" bgcolor="#FFFFFF">
<input name="checkbox[]" type="checkbox" id="checkbox[]" value='<?php echo $row['id']; ?>'></td>
<td bgcolor="#FFFFFF"><?php echo $row['fname']; ?></td>
<td bgcolor="#FFFFFF"><?php echo $row['lname']; ?> </td>
<td bgcolor="#FFFFFF"><?php echo $row['gend']; ?> </td>
<td bgcolor="#FFFFFF"><?php echo $row['phone']; ?> </td>
<td bgcolor="#FFFFFF"><?php echo $row['exp']; ?> </td>
<td bgcolor="#FFFFFF"><?php echo $row['uname']; ?> </td>
<td bgcolor="#FFFFFF"><?php echo $row['pwd']; ?> </td>
</tr>
<?php } ?>
<tr><td colspan="5" align="center" bgcolor="#FFFFFF">
<input name="delete" type="submit" id="delete" value="Delete" onclick="javascript:confirm('Are you sure to delete')"></td></tr>
<?php
if(isset($_POST['delete'])){
$checkbox = $_POST['checkbox'];
for($i=0;$i<count($_POST['checkbox']);$i++){
$del_id = $checkbox[$i];
//print '$del_id';
$sql = "DELETE FROM users WHERE id='$del_id'";
//print $sql;
$result = mysql_query($sql);}
}
if($result){
echo"successfully deleted";
}
mysql_close();
?>
</table></form></td></tr></table>
<p>Record count: <?php echo number_format($count) ?></p>