Untitled

<form accept-charset="utf-8" data-formid="form" action="" method="post" enctype="multipart/form-data" id="form-edit_cover_photo" class="" novalidate>
<div class="dropzone dropzone-single p-0" data-dropzone="data-dropzone" data-options='{"url":"valid/url","maxFiles":1,"dictDefaultMessage":"Choose or Drop a file here"}'>
  <div class="fallback"><input type="file" name="file" /></div>
  <div class="dz-preview dz-preview-single">
    <div class="dz-preview-cover dz-complete"><img class="dz-preview-img" src="../../../assets/img/generic/image-file-2.png" alt="..." data-dz-thumbnail="" /><a class="dz-remove text-danger" href="#!" data-dz-remove="data-dz-remove"><span class="fas fa-times"></span></a>
      <div class="dz-progress"><span class="dz-upload" data-dz-uploadprogress=""></span></div>
      <div class="dz-errormessage m-1"><span data-dz-errormessage="data-dz-errormessage"></span></div>
    </div>
    <div class="dz-progress"><span class="dz-upload" data-dz-uploadprogress=""></span></div>
  </div>
  <div class="dz-message" data-dz-message="data-dz-message">
    <div class="dz-message-text"><img class="me-2" src="../../../assets/img/icons/cloud-upload.svg" width="25" alt="" />Drop your file here</div>
  </div>
</div>
<button class="btn btn-primary" type="submit">submit</button>
</form>

<?php
print_r($_FILES);
echo $_FILES['file']['name'];
?>