submit two file input fields in the same form

I have a form which has two file input fields, when I try to submit the form it takes only the first one and ignore the second one!

here is my form

<form method="POST" name="vendor_form" enctype="multipart/form-data">  <div class="mb-3" style="margin-bottom: 20px;">             <label for="file_metabox" class="form-label">file metabox</label>             <input class="form-control" type="file" id="file_metabox" name="file_metabox[]" multiple="multiple">         </div>         <div class="mb-3" style="margin-bottom: 20px;">             <label for="file_cert" class="form-label">file Cert</label>             <input class="form-control" type="file" id="file_cert" name="file_cert[]" multiple="multiple">         </div> <button type="submit" class="btn btn-primary" id="submit" name="submit">Submit</button> 

and here is the php

if (isset($  _FILES['file_metabox'])) {     $  file_metabox = $  _FILES['file_metabox'];     foreach ($  file_metabox['name'] as $  key => $  value) {         if ($  file_metabox['name'][$  key]) {             $  file = array(                 'name' => $  file_metabox['name'][$  key],                 'type' => $  file_metabox['type'][$  key],                 'tmp_name' => $  file_metabox['tmp_name'][$  key],                 'error' => $  file_metabox['error'][$  key],                 'size' => $  file_metabox['size'][$  key]             );             $  _FILES = array("file_metabox" => $  file);             foreach ($  _FILES as $  file => $  array) {                 // $  newupload = frontend_handle_attachment( $  file, $  post_success );                 if ($  _FILES[$  file]['error'] !== UPLOAD_ERR_OK) __return_false();                  require_once(ABSPATH . "wp-admin" . '/includes/image.php');                 require_once(ABSPATH . "wp-admin" . '/includes/file.php');                 require_once(ABSPATH . "wp-admin" . '/includes/media.php');                  $  attach_id = media_handle_upload($  file, $  post_success);                  add_post_meta($  post_success, 'file_metabox', $  attach_id);             }         }     }     } if (isset($  _FILES['file_cert'])) {     $  file_cert = $  _FILES['file_cert'];     foreach ($  file_cert['name'] as $  key => $  value) {         if ($  file_cert['name'][$  key]) {             $  file = array(                 'name' => $  file_cert['name'][$  key],                 'type' => $  file_cert['type'][$  key],                 'tmp_name' => $  file_cert['tmp_name'][$  key],                 'error' => $  file_cert['error'][$  key],                 'size' => $  file_cert['size'][$  key]             );             $  _FILES = array("file_cert" => $  file);             foreach ($  _FILES as $  file => $  array) {                 // $  newupload = frontend_handle_attachment( $  file, $  post_success );                 if ($  _FILES[$  file]['error'] !== UPLOAD_ERR_OK) __return_false();                  require_once(ABSPATH . "wp-admin" . '/includes/image.php');                 require_once(ABSPATH . "wp-admin" . '/includes/file.php');                 require_once(ABSPATH . "wp-admin" . '/includes/media.php');                  $  attach_id = media_handle_upload($  file, $  post_success);                  add_post_meta($  post_success, 'file_cert', $  attach_id);             }         }     } }