Image Upload Preview

index.php

<form action="/controller.php" method="post" enctype="multipart/form-data">
  <input type="file" id="imgInput" name="file" />
  <img src="/assets/default_empty.png" id="upImage" src="#" alt="Upload Image" />
</form>

<script type="text/javascript">

    function readURL(input) {
        if (input.files && input.files[0]) {
            var reader = new FileReader();

            reader.onload = function(e) {
                $('#upImage').attr('src', e.target.result);
            }

            reader.readAsDataURL(input.files[0]);
        }
    }

    $("#imgInput").change(function() {
        readURL(this);
    });
  
</script>