delete button in PHP website behaving like static when clicked - php

Question

i have a simple delete button in PHP which uses simple SQL query to delete the data from database, I have used the following code:
$myid = $this->uri->segment('3');
if (isset($_POST['submit'])){
$ret = mysqli_query($con,"delete * from smart_category where name='$myid'");
header("Location: https://cloudclassmate.com/jewelry-catalogue/admin/viewcategory");
}
<div style="margin-left:38%" class="clearfix">
<a href="https://cloudclassmate.com/jewelry-catalogue/admin/viewcategory">
<button type="button" class="cancelbtn bemine">Cancel</button></a>
<form action="" method="post" ><button type="submit" name="submit" class="deletebtn bemine">Delete</button></form>
</div>
the problem here is if I click the delete button, its not responding, nothing is happening. the button is like static. can anyone please tell me what could be wrong here

Answer 1

If any Javasscript is not involved, than just put form action.
Also send myid in the request or in URI.
please see below:
<div style="margin-left:38%" class="clearfix">
<button type="button" class="cancelbtn bemine">Cancel</button>
<form action="abc.php" method="post" ><button type="submit" name="submit" class="deletebtn bemine">Delete</button></form>
</div>

Answer 2

You should add an action url/path to where your PHP file is located and add a Method to your form. Also, I noticed you deleting an entry where "name" is equal to $myid please check if that is correct.
<div style="margin-left:38%" class="clearfix">
<button type="button" class="cancelbtn bemine">Cancel</button>
<form action="url-to-server.php" method="post" >
<button type="submit" name="submit" class="deletebtn bemine">Delete</button>
</form>
</div>
$myid = $this->uri->segment('3');
if (isset($_POST['submit'])){
$ret = mysqli_query($con,"delete * from smart_category where name='$myid'");
header("Location: https://cloudclassmate.com/jewelry-catalogue/admin/viewcategory");
}