How to upload multiple files using PHP postgresql

I'm trying to create a form where user can upload multiple file. When i tried to upload a file and add another file, the old file got replace by the new file that i just upload.

Html :

<form name="form1" method="post" action="form.php?mode=add" enctype="multipart/form-data" onSubmit="return check();">
<div class="form-group row">
    <label class="col-3 col-form-label">Dokumen Sketsa Kejadian</label>
    <input type="file" name="dokumen_sketsa_kejadian[]" id="dokumen_sketsa_kejadian" multiple>
  </div>
</form>

The store logic :

$jenis_dokumen_sketsa = 'Sketsa Kejadian';

    $dir = "../uploads/";
    if(isset($_FILES['dokumen_sketsa_kejadian'])){
      $totalFiles = count($_FILES['dokumen_sketsa_kejadian']['name']);

      for($i = 0; $i<$totalFiles; $i++){
        $dokumenSketsa = $_FILES['dokumen_sketsa_kejadian']['name'][$i];
        $file = $_FILES['dokumen_sketsa_kejadian']['tmp_name'][$i];

        move_uploaded_file($file, $dir.$dokumenSketsa);

        $queryInsertFile = "INSERT INTO dokumen_kecelakaan(id_kecelakaan, jenis_dok_kecelakaan, dokumen)
        VALUES (currval('kecelakaan_seq'), , )"; // Assuming you're using a sequence to generate id_kecelakaan

        $resultInsert = pg_query_params($connection, $queryInsertFile, array($jenis_dokumen_sketsa, $dokumenSketsa));

        if (!$resultInsert) {
            echo "Error in SQL query: " . pg_last_error();
            die();
        }
      }
    }
    echo "<META HTTP-EQUIV=\"refresh\" content=\"0; URL=list.php\">";