Form not submitting after bootstrap confirmation - php

Question

Firstly I will apologise my knowledge of jquery/javascript is not very good so my mistake maybe very obvious to some but I am still learning so be gentle!
I have a form which allows the members to delete posts they have made from the database. The form works fine and using php deletes the data from the database as I want. I wanted to create a popup that gets the user to confirm thats what they would like to do. I don't want to use the bog standard browser specific onclick method I wanted something a bit more customisable. So I am trying to use bootbox, I currently have the confirmation box popping up onclick but when you select yes, nothing else happens. I suspect the result from the jquery is not firing the form but from what I have read my code for that part is good?
I have pasted below my php, jquery and html
PHP:
<?php
$deletepost = 'none';
$deleteposterror = 'none';
if(isset($_POST['delete'])) {
$del_topic_id = $_POST['topic_id_value'];
// sql to delete a record
$pass_fail = "DELETE FROM topics WHERE topic_id ='$del_topic_id';";
$pass_fail .= "DELETE FROM posts WHERE topic_id_post ='$del_topic_id'";
if (mysqli_multi_query($conn, $pass_fail)) {
$deletepost = 'show';
}else{
$deleteposterror = 'show';
echo "ERROR: Could not able to execute $pass_fail. " . mysqli_error($conn);
}
}
?>
HTML & PHP in while loop:
<?php
$sql1 = "SELECT * FROM topics WHERE topic_by = '".$id."' ORDER BY topic_date DESC ";
$result1 = mysqli_query($conn, $sql1);
while($row = $result1->fetch_assoc()) {
$topic_id = $row ['topic_id'];
$topic_subject = $row ['topic_subject'];
?>
<div class='chat_post_titles' >
<div class='row'>
<div class='col-md-7 chat_post_text_align_left'>
<?php echo $topic_subject?>.
</div>
<div class='col-md-2 chat_post_text_align_right'>
<?php
$my_date = $row['topic_date'];
$date = DATE("G:i:s d/m/Y",strtotime($my_date));
?>
<div class='hide_text'>Post Date: </div>
<?php echo $date?>
</div>
<div class='col-md-2 chat_post_text_align_centre'>
<div class='hide_text'>Delete Post: </div>
<form method="post" class="delete_post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
<input type="hidden" name="topic_id_value" id="topic_id_value" value="<?php echo $topic_id?>">
<button type="submit" name="delete" id="delete" class="btn btn-danger buttonElement">Delete</button>
</form>
</div>
</div>
</div>
<?php
}
?>
JQUERY at bottom of page:
</body>
<?php include("../PHP/js.php"); ?>
<script type="text/javascript" src="../Members/updatedetails.js"></script>
<script type="text/javascript" src="../Members/bootbox.min.js"></script>
<script>
$('form').on('click','button.buttonElement',function (e) {
var form = $(this).closest('form'); // <-- add this
e.preventDefault();
bootbox.confirm({
message: "Are you sure you want to delete your post?",
title: "Delete Post",
buttons: {
cancel: {
label: "No",
className: "btn btn-default"
},
confirm: {
label: "Yes",
className: "btn btn-default"
}
},
callback: function(result) {
if(result == true) {
form.submit();
}
}
});
});
</script>
</html>

Answer 1

Finally worked out why my code wasn't working in my php I was using
if(isset($_POST['delete']))
but when using javascript submit() function this name attr is removed. So I used the name of the hidden input like so if(isset($_POST['topic_id_value'])) and it worked as normal.
Still thanks to the guys that gave me advice