Hoe can ik max file size toevoegen.

Ik heb hier een script op images te uploaden maar ik wil graag een limit van b.v 1.5 mb (1500kb). Weet iemand hoe je dat in het onderstaande script kan toevoegen veranderen?

<?php
///////////////////////////////////////////////////////////////////////////////
// //
// Program Name : ProPhotoHost //
// Release Version : 1.0 //
// Home Page : http://www.prophotohost.com //
// Program Author : Jake P //
// Supplied by : drew010 //
// Nullified by : CyKuH [WTN] //
// Distribution : via WebForum, ForumRU and associated file dumps //
// //
///////////////////////////////////////////////////////////////////////////////
session_start();
include('i.setup.php');
include('i.connection.php');
include('i.function.php');

if($mode == "upload") {
$num_files = count($file);
for($i = 0; $i < $num_files; $i++) {
if($file_size[$i] != 0) {
if($file_type[$i] != "image/pjpeg" and $file_type[$i] != "image/gif" and $file_type[$i] != "image/x-png") {
if($page == "more") {
header("location: ./add.image.php?mode=more&error=filetype");
exit;
}
else {
header("location: ./add.image.php?error=filetype");
exit;
}
exit;
}
}
}
for($i = 0; $i < $num_files; $i++) {
if($file_size[$i] != 0) {

$size = $file_size[$i];
$base = random(32, "");
$original = $file_name[$i];

switch($file_type[$i]) {
case "image/pjpeg":
$ext = "jpg";
break;
case "image/gif":
$ext = "gif";
break;
case "image/x-png":
$ext = "png";
break;
}

$name = $base . "." . $ext;

$image_size = getimagesize($file[$i]);
$width = $image_size[0];
$height = $image_size[1];

copy($file[$i], "./hosted/" . $name);

if($width > $height) {
$new_width = 50/$image_size[0];
$new_height = $image_size[1] * $new_width;
$new_width = 50;
}
else {
$new_height = 50/$image_size[1];
$new_width = $image_size[0] * $new_height;
$new_height = 50;
}

//print($file_type[$i]);
//exit;

switch($file_type[$i]) {
case "image/pjpeg":

$dst_img = ImageCreate($new_width, $new_height);
$src_img = ImageCreateFromJPEG("./hosted/" . $name);

imagecopyresized($dst_img, $src_img, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

imagejpeg($dst_img, "./hosted/thumb_" . $name, 100);

break;
case "image/x-png":

$dst_img = ImageCreate($new_width, $new_height);
$src_img = ImageCreateFromPNG("./hosted/" . $name);

imagecopyresized($dst_img, $src_img, 0, 0, 0, 0, $new_width, $new_height, $width, $height);

imagepng($dst_img, "./hosted/thumb_" . $name, 100);

break;
}

$date = now();

$sql = "INSERT INTO image (image_name,image_original,image_ext,image_size,image_width,image_height,image_caption,image_member_id,image_status,created_on,updated_on) VALUES ('$base','$original','$ext','$size','$width','$height','$caption[$i]','$session_member_id','A','$date','$date')";
$result = mysql_query($sql);
}
}

header("location: ./home.php");
}
?>