Uploud gambar

function uploud() {

  //      $folder = "tmp/";
		$extensi_diperbolehkan = array('png', 'jpg', 'jpeg');
		$nama = $_FILES['gambar']['name'];
		$x = explode('.', $nama);
		$extensi = strtolower(end($x));
		$ukuran = $_FILES['gambar']['size'];
		$error = $_FILES['gambar']['error'];
		$tmp = $_FILES['gambar']['tmp_name'];




		if($ukuran > 1044070 ) {
					echo "
  		<script>
  		alert('gambar terlalu besar!');

  		</script>

  		";
 		return false;
  		}

		if(!in_array($extensi, $extensi_diperbolehkan)){
	echo "<script>
	alert('yang anda uploud bukan gambar!');
	</script>";
  	return false;
  		}

  		$namaFile = uniqid();
  		$namaFile .='.';
  		$namaFile .=$extensi;
  	//	var_dump($namaFile);
  //		die;


move_uploaded_file

Saya mau uploud gambar. Gambar berhasil tersimpan di database dan folder tapi di index/table gambar tidak muncul itu kenapa ya? Saya mohon bantuanya trima kasih