Nahrávanie obrázkov na server v php

<?php
if ($_POST[submit])
 {
 $rand_name = md5(time());

$rand_name= rand(0,999999999);
 if (
 ($_FILES["uploadedfile"]["type"] == "image/jpeg")
|| ($_FILES["uploadedfile"]["type"] == "image/jpg")|| ($_FILES["uploadedfile"]["type"] == "image/pjpeg") )
{
     $imagename = $_FILES['uploadedfile']['name'];
     $source = $_FILES['uploadedfile']['tmp_name'];
     $t="{$rand_name}.jpg";
$target = "upload/{$rand_name}.jpg";

if( move_uploaded_file($source, $target)) {
  //echo $source;

  ECHO "<BR>";  echo " <span class='dobrasprava'>Súbor sa úspešne nahral na server</span>";ECHO "<BR>";

}
}
}
?>


<form name='f' action="" method="post" enctype="multipart/form-data" >

<input name="uploadedfile" class="input" id='uploadedfile'  type="file" />

<br><br>
    <input type="submit" name="submit" value="odoslat">
</form>