php - boostrap modal doesnt show up

Solution:

Make sure your code contains bootstrap CSS and Bootstrap Js. Like,

<head>

  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">

  <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>

  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"> 
  </script>

  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"> 
  </script>

Answer

Solution:

If you are using Bootstrap5 than change data-toggle to data-bs-toggle and data-target to data-bs-target.

Source