Multiple deletion & edit of data in PHP - php

Question

When I was trying to delete one data from the database but it would either delete the whole data in the database; it also the same problem for edit.
this code is for delete a user that will show a prompt when deleting a user:
<div id="delete_user<?php echo $id; ?>" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-body">
<div class="alert alert-danger">Are you Sure yuo want to Delete this Data?</div>
</div>
<div class="modal-footer">
<a class="btn btn-danger" href="delete_user.php<?php echo '?id='.$id; ?>"><i class="icon-check"></i> Yes</a>
<button class="btn" data-dismiss="modal" aria-hidden="true"><i class="icon-remove icon-large"></i> Close</button>
</div>
</div>
and this code here below is the actual delete from the database
<?php
include('dbcon.php');
$id=$_GET['id'];
mysql_query("delete from users where user_id='$id'") or die(mysql_error());
header('location:users.php');
?>

Answer 1

First check if value is set in $_GET['id'] then perform your action.
<?php
include('dbcon.php');
if(isset($_GET['id'])){
$id=mysql_real_escape_string($_GET['id']);
mysql_query("delete from users where user_id='$id'") or die(mysql_error());
}
header('location:users.php');
?>

Answer 2

your code seem to be okay, just check the debug the id value.
But still i strongly believe for such action don't pass id's in GET method. Use POST in ajax.
Below is the code with the ajax using POST method to pass the id to delete_user.php page
<div id="delete_user<?php echo $id; ?>" class="modal hide fade" tabindex="-1" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
<div class="modal-body">
<div class="alert alert-danger">Are you Sure yuo want to Delete this Data?</div>
</div>
<div class="modal-footer">
<a class="btn btn-danger" onclick="deleteUser(<?php echo $id; ?>)" href="javascript:void(0)"> <i class="icon-check"></i> Yes</a>
<button class="btn" data-dismiss="modal" aria-hidden="true"><i class="icon-remove icon-large"></i> Close</button>
</div>
</div>
Below the jquery ajax part
function deletUser(id) {
$.ajax({
url: 'delete_user.php',
method: 'POST',
data: {"id" : id},
success: function(data) {
// on success alter the div structure.....
}
});
}
below is code for your delete_user.php page
include('dbcon.php');
if(isset($_POST['id']) && $_POST['id'] != ''){
$id = (int)$_POST['id'];
mysql_query("delete from users where user_id=$id") or die(mysql_error());
}
header('location:users.php');