Ajax display msg on submit without refresh - php

Question

I am submitting form data via Ajax and would like to display a message above the form on successful submit.
Currently the form does send the data successfully. It should render the feedback message on form submit <?php $this->renderFeedbackMessages(); ?> as defined in my config.php
Where am I going wrong? Possibly doing things in the wrong order due to first time working with mvc?
my config.php file I have the following defined;
define("FEEDBACK_BOOK_ADD_SUCCESSFUL", "Book add successful.");
my model;
public function addIsbn($isbn)
{
// insert query here
$count = $query->rowCount();
if ($count == 1) {
$_SESSION["feedback_positive"][] = FEEDBACK_BOOK_ADD_SUCCESSFUL;
return true;
} else {
$_SESSION["feedback_negative"][] = FEEDBACK_NOTE_CREATION_FAILED;
}
// default return
return false;
}
my controller;
function addIsbn()
{
// $_POST info here
header('location: ' . URL . 'admin/searchIsbn');
}
my searchIsbn.php;
<?php $this->renderFeedbackMessages(); ?>
<div>
//my html form here
</div>
<div id="result"></div>
<script>
$('#form').submit(function() {
event.preventDefault();
var isbn = $('#isbn_search').val();
var url='https://www.googleapis.com/books/v1/volumes?q=isbn:'+isbn;
$.getJSON(url,function(data){
$.each(data.items, function(entryIndex, entry){
$('#result').html('');
var html = '<div class="result">';
html += '<h3>' + entry.volumeInfo.isbn + '</h3>';
html += '<hr><button type="button" id="add" name="add">add to library</button></div>';
$(html).hide().appendTo('#result').fadeIn(1000);
$('#add').click(function(ev) {
$.ajax({
type: 'POST',
url: '<?php echo URL; ?>admin/addIsbn',
data: {
'isbn' : isbn
}
});
});
});
});
});
</script>
No console error messages.

Answer 1

You are redirecting here:
header('location: ' . URL . 'admin/addIsbn');
remove it.
echo the success message here and add it to an HTML element's .html() API.
Your page will not be refreshed.

Answer 2

Your page is making the call to admin/addIsbn which is redirected to admin/searchIsbn. So you already have the output of renderFeedbackMessages() being sent to your function.
Use the success callback to output the results to the page:
$.ajax({
type: 'POST',
url: '<?php echo URL; ?>admin/addIsbn',
data: {
'isbn' : isbn
},
success: function(data) {
$('#result').html(data);
}
});

Answer 3

The only way I could get this to work was to add an auto-refresh to my Ajax success function as follows;
window.location.reload(true);
Working however open to suggestions.