please help i don't know how to delete multiple rows in mysql using checkboxes, because it seems the delete doesn't seem to work.
here's the code:

<?php
$host="localhost"; // Host name
$username=""; // Mysql username
$password=""; // Mysql password
$db_name="test"; // Database name
$tbl_name="test_mysql"; // 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">&nbsp;</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>Name</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Lastname</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Email</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['name']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['lastname']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['email']; ?></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete"></td>
</tr>
<?
// Check if delete button active, start this
if($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_multiple.php
if($result){
echo "<meta http-equiv=\"refresh\" content=\"0;URL=delete_multiple.php\">";
}
}
mysql_close();
?>
</table>
</form>
</td>
</tr>
</table>

it won't help sorry.. coz im lookin for the delete function not validation

hello..
see that code is not for validating...
for checking checkboxes only...
its working fine for me...

yep but i need the delete function for mysql >.< i dont know how to query the data from mysql in php when using the checkboxes in each row.

ya,this is the continuation code for the above post...
after getting all check boxes you checked,then write this query to delete them(checked)

if(isset($_POST['check_compare']))
{
$tempids=$_POST['check_compare'];	
echo $tempids;

$ser_qry="delete  from sometable where find_in_set(p_id,'".$_POST['check_compare']."')";
$ser_res=mysql_query($ser_qry);


}

yep but i need the delete function for mysql >.< i dont know how to query the data from mysql in php when using the checkboxes in each row.

hi.. i am a also a newbie.. try this one.. this worked for me. :)

<html>
	<head>

	</head>
	<body>
		<?php
			//mysql connection
			$dbconn = mysql_connect("","","") or die();
			mysql_select_db("table") or die();
			
			$sqlquery = "your query"; // query on table
			$sqlresult = mysql_query($sqlquery, $dbconn);
			$count = mysql_num_rows($sqlresult); // count query result			
			
		?>
		
		<form method="post" action="delete.php">
			<!--
				some table headers here / or html tags
			-->
		<?php
			//loop here
			while($row = mysql_fetch_array($sqlresult))
			{
			//inside while
		?>
				<tr>
					<td><input type="checkbox" name="checkbox[]" id="checkbox[]"  value="<?php echo $row['id']?>" /></td>
					<!--
					and other data you want to print out..
					-->
				</tr>
		<?php	
			}
		?>	
				<tr><input id='delete' type='submit' name='delete' value='Delete'/></tr>
		</form>
	</body>
</html>

<?php
#these following code for delete.php file 
?>

<html>
	<?php
		//mysql connection here
		
		if($_POST['delete']) // from button name="delete"
		{
			$checkbox = $_POST['checkbox']; //from name="checkbox[]"
			$countCheck = count($_POST['checkbox']);
			
			for($i=0;$i<$countCheck;$i++)
			{
				$del_id  = $checkbox[$i];
				$sql = "delete from table where id = $del_id";
				$result = mysql_query($sql, $dbconn);
			}
				if($result)
				{
					echo "successful delete";
				}
				else
				{
					echo "Error: ".mysql_error();
				}
		}
	?>
</html>

finally!!!!!!! it worked! thank you to everyone especially to enim!

Thak you very much!

guys i just added two small variables because register globals is been removed from new version of php this will work 100%

<?php
$host="localhost"; // Host name
$username="root"; // <strong class="highlight">Mysql</strong> username
$password=""; // <strong class="highlight">Mysql</strong> password
$db_name="mytest"; // Database name
$tbl_name="userreg"; // 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">&nbsp;</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>Name</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Lastname</strong></td>
<td align="center" bgcolor="#FFFFFF"><strong>Email</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['name']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['lastname']; ?></td>
<td bgcolor="#FFFFFF"><? echo $rows['email']; ?></td>
</tr>
<?php
}
?>
<tr>
<td colspan="5" align="center" bgcolor="#FFFFFF"><input name="delete" type="submit" id="delete" value="Delete"></td>
</tr>
<?
// Check if <strong class="highlight">delete</strong> button active, start this
$delete = $_POST[delete];
$checkbox = $_POST[checkbox];
if($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_multiple.php
if($result){
echo "<meta http-equiv=\"refresh\" content=\"0;URL=test.php\">";
}
}
mysql_close();
?>
</table>
</form>
</td>
</tr>
</table>

Warning: Cannot modify header information - headers already sent by (output started at D:\xampp\htdocs\kregpho.php:2) in D:\xampp\htdocs\kregpho.php on line 72


can any 1 tell me wat this error mean....y should it occur.

Warning: Cannot modify header information - headers already sent by (output started at D:\xampp\htdocs\kregpho.php:2) in D:\xampp\htdocs\kregpho.php on line 72


can any 1 tell me wat this error mean....y should it occur.

It means that you use a header function (header(), setcookie(), session_start(), etc...) after you started sending content. After you start sending content, the headers can not be modified.

And by "sending content", I mean anything that would show up in the browsers "view source" output. Even a white-space before your opening <?php tags would cause this error.

P.S.
Why did you post this into an old, random thread?

This question has already been answered. Start a new discussion instead.