Why is my delete operation not performing? - php

Question

In my project, I want a delete operation for a particular id when I click on the delete button, but it isn't performing. Here's my code for displaying the table:
<table class="listing" cellpadding="0" cellspacing="0">
<tr>
<th class="first"><center>Id</center></th>
<th>Category Name</th>
<th>Status</th>
<th>Edit</th>
<th class="last">Delete</th>
</tr>
<?php
include('config.php');
$sql="select * from category_tbl";
$result=mysql_query($sql);
while ($row=mysql_fetch_array($result)) {
if($row['cat_status'] == 0) {
$im='<img src="../images/red.jpg" height="28" width="28">';
}
else{
$im='<img src="../images/green.jpg" height="30" width="30">';
}
if (isset($_REQUEST['false'])) {
$updt=mysql_query("update category_tbl set cat_status=1 where cat_id='".$_REQUEST['false']."'");
header('location:category.php');
}
if (isset($_REQUEST['true'])) {
$updt=mysql_query("update category_tbl set cat_status=0 where cat_id='".$_REQUEST['true']."'");
header('location:category.php');
}
?>
<tr>
<td><strong><?php echo $row['cat_id'];?></strong></td>
<td><strong><?php echo $row['cat_name'];?></strong></td>
<td><?php echo $im;?></td>
<td><img src="../images/edit.jpg" height="30" width="60" value=<?php echo $row['cat_id'];?>></td>
<td><img src="../images/delete1.jpg" height="30" width="60" value=<?php echo $row['cat_id'];?>></td>
</tr>
<?php
}
?>
</table>
The edit operation is working, but delete is not.
This is my code for delete:
<?php
include("config.php");
$id=$_REQUEST['id'];
$sql=mysql_query("DELETE FROM category_tbl WHERE cat_id='".$id."'");
if ($sql) {
header("location:category.php");
}
?>
After execution it stays on delete_cat.php?id=(passed id)....

Answer 1

i think you need to remove your foreign key from sub table or second option is you need to alter your query and set cascade like this.
ON DELETE CASCADE
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