<form action="http://storageServer/upload_file.php" method="post"
enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file" />
<br />
<input type="submit" name="submit" value="Submit" />
</form>

<?php
$folder = "files/";
$path = $folder . basename( $_FILES['file']['name']);
if(move_uploaded_file($_FILES['file']['tmp_name'], $path)) {
echo "The file ".  basename( $_FILES['file']['name']). " has been uploaded";
} else{
echo "There was an error uploading the file, please try again!";
}
?>

$ch = curl_init("http://www.remotepage.com/upload.php");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, array('fileupload' => '@'.$_FILES['theFile']['tmp_name']));
echo curl_exec($ch);