Upload Immagine ridimensionata con canvas

[Gian76]

ciao,
Ho questo script che tramite form ridimensiona lato CLIENT l'immagine che l'utente a selezionato sul suo pc e fino a qua tutto ok, ora devo fare l'upload dell'immagine già RIDIMENSIONATA su una certa cartella sul server ma non riesco qualcuno sa aiutarmi:

<?php
if(isset($_POST['submit'])){


	// UPLOAD SU SERVER	  if(isset($_FILES['some_filename'])){	   $tempPos = $_FILES['some_filename']['tmp_name'];	   $destPos = "/image".$_FILES['some_filename']['name'];	   move_uploaded_file($tempPos, $destPos);	   echo "Operazione eseguita";		}


 } // fine if(isset($_POST['invia']						   						   ?>





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


<img src="" id="image" name="image"  >
<input id="input" type="file" onchange="handleFiles()"><script>
function handleFiles(){    var filesToUpload = document.getElementById('input').files;    var file = filesToUpload[0];
    // Create an image    var img = document.createElement("img");    // Create a file reader    var reader = new FileReader();    // Set the image once loaded into file reader    reader.onload = function(e)    {        img.src = e.target.result;
        var canvas = document.createElement("canvas");        //var canvas = $("<canvas>", {"id":"testing"})[0];        var ctx = canvas.getContext("2d");        ctx.drawImage(img, 0, 0);
        var MAX_WIDTH = 400;        var MAX_HEIGHT = 300;        var width = img.width;        var height = img.height;
        if (width > height) {          if (width > MAX_WIDTH) {            height *= MAX_WIDTH / width;            width = MAX_WIDTH;          }        } else {          if (height > MAX_HEIGHT) {            width *= MAX_HEIGHT / height;            height = MAX_HEIGHT;          }        }        canvas.width = width;        canvas.height = height;        var ctx = canvas.getContext("2d");        ctx.drawImage(img, 0, 0, width, height);
        var dataurl = canvas.toDataURL("image/png");        document.getElementById('image').src = dataurl;    

    }    // Load files into file reader    reader.readAsDataURL(file);

    // Post the data      /*	var fd = new FormData();    fd.append("name", "some_filename");    fd.append("image", dataurl);    fd.append("info", "lah_de_dah");	*/    }</script>




	<input type="submit" name="submit" value=" UPLOAD SU SERVER " onClick="return confirm(' sei sicuro? ')" >


	</form>