How to toggle this modal from PHP on submit code? - php

Question

I have this modal:
<div class="container">
<div class="modal fade" id="myModal" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
</div>
And I would like to toggle it when I am executing some PHP code
if(//){
//toggle modal
}
What I have tried so far was setting a flag to true when function is executed and then in html I do this:
<?php if ($show_modal) : ?>
<script>
$('#myModal').modal('show');
</script>
<?php endif; ?>
but it still doesn't work. Any one knows whats going on here?
EDIT: all the plugins I am loading in the html header
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link rel="stylesheet" type="text/css" href="../style.css">
<link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.20/css/jquery.dataTables.min.css" />
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script type="text/javascript" src="https://cdn.datatables.net/1.10.20/js/jquery.dataTables.min.js"></script>
<meta name="viewport" content="width=device-width, initial-scale=1">

Answer 1

Because you have set jquery plugin twice, it might be getting difficult. So, you have 2 options in my mind. First, you could move bootstrap plugin to the bottom and remove one of the jquery plugins. Just before body ends. like:
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
<?php if ($show_modal) : ?>
<script>
$('#myModal').modal('show');
</script>
<?php endif; ?>
Or, you could use:
$(document).ready(function(){
// Here goes yor code
});
As you import bootstrap, and again added jquery plugin. You have to use document.ready to insure all files are loaded, then we will use the function.
*Note:- You might have to move the jquery table plugin after bootstrap too, if you move the bootstrap.js. I am not sure about that, cos I haven't use that plugin yet.