<form enctype="multipart/form-data" action="upload_file.php" method="POST">
Choose a file to upload: <input name="uploaded" type="file" /><br />
<input type="submit" value="Upload File" />
</form>

<?php
$target = "upload/";
$target = $target . basename( $_FILES['uploaded']['name']) ;
$ok=1;
$uploaded_type= $_FILES['uploaded']['type'];
$uploaded_size= $_FILES['uploaded']['size'];

//This is our size condition
if ($uploaded_size > 350000)
{
echo "Your file is too large.<br>";
$ok=0;
}

//This is our limit file type condition
if ($uploaded_type =="text/php")
{
echo "No PHP files<br>";
$ok=0;
}

//Here we check that $ok was not set to 0 by an error
if ($ok==0)
{
Echo "Sorry your file was not uploaded";
}

//If everything is ok we try to upload it
else
{
if(move_uploaded_file($_FILES['uploaded']['tmp_name'], $target))
{
echo "The file ". basename( $_FILES['uploadedfile']['name']). " has been uploaded";
}
else
{
echo "Sorry, there was a problem uploading your file.";
}
}
?>

echo "The file ". basename( $_FILES['uploadedfile']['name']). " has been uploaded";

echo '<pre>';
print_r($_FILES);
echo '<pre>';

<?php

if (TRUE) {
  echo '<pre>';
  print_r($_FILES);
  echo '<pre>';
}

$ok = TRUE;

// Check if there is an uploaded file.
if (!array_key_exists('uploaded', $_FILES) && !empty($_FILES['uploaded'])) {
  echo "Sorry, no file seems to be uploaded.";
  $ok = FALSE;
}

$target = "upload/";
$target = $target . basename($_FILES['uploaded']['name']) ;
$uploaded_type = $_FILES['uploaded']['type'];
$uploaded_size = $_FILES['uploaded']['size'];

// This is our size condition.
if ($uploaded_size > 350000) {
  echo "Your file is too large.<br>";
  $ok = FALSE;
}

//This is our limit file type condition
if ($uploaded_type =="text/php") {
  echo "No PHP files<br>";
  $ok = FALSE;
}

// Here we check that $ok was not set to 0 by an error
if ($ok) {
  echo "Sorry your file was not uploaded";
}
// If everything is ok we try to upload it
else {
  if (move_uploaded_file($_FILES['uploaded']['tmp_name'], $target)) {
    echo "The file ". basename( $_FILES['uploaded']['name']). " has been uploaded";
  }
  else {
    echo "Sorry, there was a problem uploading your file.";
  }
}
?>