Trying to get PHP responce on ajax - php

Question

Here I am trying to update the MSQL table using jQuery, both PHP code and jQuery script is written on the same page, the code working fine to update my tables but the response msg is not getting by the AJAX so it always shows me the default message "Some problem occurred, please try again.".
HTML
<!-- HTML code to display msg -->
<p class="statusMsg_post"></p>
jQuery
<script>
$(document).ready(function(){
$('#btn_publish').click( function() {
var obj_post_postID="<?php echo $post_id; ?>";
var publish_post="publish";
$.ajax({
type:'POST',
// url:'post_view.php',
data:{
"post_status_update": publish_post,
"obj_post_status": obj_post_postID,
},
success:function(res) {
if (res=='ok') {
$('.statusMsg_post').html('<span style="color:green;">Post has been '+publish_post+' sucessfully</span>');
}
else {
$('.statusMsg_post').html('<span style="color:red;">Some problem occurred, please try again.</span>');
}
}
});
});
});
</script>
PHP
// my PHP code to update my table
<?php
// require_once('../../inc/db-connect.php');
if (isset($_POST['post_status_update'])) {
$temp_publish_post = $_POST['post_status_update'];
echo $bj_post_postID = $_POST['obj_post_status'];
$obj_post_status_query = "UPDATE `objection_report` SET `obj_status` = '$temp_publish_post' WHERE `objection_report`.`obj_post_id` = $bj_post_postID;";
$obj_post_status_query .= "UPDATE `post` SET `status` = '$temp_publish_post' WHERE `post`.`post_id` = $bj_post_postID ;";
if (mysqli_multi_query($con, $obj_post_status_query)) {
echo "ok";
die;
}
}
?>
all the above codes are on the same page

Answer 1

The script is returning the HTML and JS on the ajax call. If you put checks around the HTML it will not:
<?php if ( ! isset( $_POST['post_status_update'] ) ): ?>
<p class="statusMsg_post"></p>
<script>
$( document ).ready( function () {
$( '#btn_publish' ).click( function () {
var obj_post_postID = "<?php echo $post_id; ?>";
var publish_post = "publish";
$.ajax( {
type: 'POST',
// url:'post_view.php',
data: {
"post_status_update": publish_post,
"obj_post_status": obj_post_postID,
},
success: function ( res ) {
if ( res === 'ok' ) {
$( '.statusMsg_post' ).html( '<span style="color:green;">Post has been ' + publish_post + ' sucessfully</span>' );
} else {
$( '.statusMsg_post' ).html( '<span style="color:red;">Some problem occurred, please try again.</span>' );
}
}
} );
} );
} );
</script>
<?php endif; ?>