pesan eror gak bisa tampil (PHP)

mau tanya, kenapa ya pesan eror dibawah gak bisa tampil di halaman web saya?? terimakasih sebelumnya :)

// Check file size
if ($_FILES["fileku"]["size"][$key] > 1024*1000) {
  echo "Sorry, your file is too large."; //bagian ini gak tampil pesannya
}

full code dibawah v

<?php
$direktori = "file";
foreach ($_FILES["fileku"]["error"] as $key => $error) {
    if ($error == UPLOAD_ERR_OK) {
        $tmp_name = $_FILES["fileku"]["tmp_name"][$key];
        $name = $_FILES["fileku"]["name"][$key];
        $imageFileType = pathinfo($name,PATHINFO_EXTENSION);
        // Check file size
        if ($_FILES["fileku"]["size"][$key] > 1024*1000) {
            echo "Sorry, your file is too large."; //bagian ini gak tampil pesannya
        }
        // Allow certain file formats
        elseif ($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
        && $imageFileType != "pdf" ) {
            echo "Sorry, only JPG, JPEG, PNG & PDF files are allowed.";
        }
        else {
          move_uploaded_file($tmp_name, $direktori."/".$name);
          // Masukkan informasi file ke database
          $konek = mysqli_connect("localhost","root","","upload");

          $query = "INSERT INTO upload (nama_file)
                    VALUES('$name')";
                    //VALUES('$nama_file', '$_POST[deskripsi]', '$tgl_upload')";

          mysqli_query($konek, $query);
          echo "File $name berhasil diupload <br>";
        }

    }
}
?>