$file = $_FILES['FILE_UPLOAD']['tmp_name'];
$file_name = $_FILES['FILE_UPLOAD']['name'];
$file_type = $_FILES['FILE_UPLOAD']['type'];
$peso = $_FILES['FILE_UPLOAD']['size']; 
}

$check = @fopen($file, "r");
$check = @fread($check, filesize($file));
if (preg_match("/html/i", $check)) {
$message = "Sorry this file is not valid";
$mklib->error_page($message);
exit;
}
if (preg_match("/javascript/i", $check)) {
$message = "Sorry this file is not valid";
$mklib->error_page($message);
exit;
}
if (preg_match("/about/i", $check)) {
$message = "Sorry this file is not valid";
$mklib->error_page($message);
exit;
}
if (preg_match("/vbscript/i", $check)) {
$message = "Sorry this file is not valid";
$mklib->error_page($message);
exit;
}
if (preg_match("/alert/i", $check)) {
$message = "Sorry this file is not valid";
$mklib->error_page($message);
exit;
}
if (preg_match("/onmouseover/i", $check)) {
$message = "Sorry this file is not valid";
$mklib->error_page($message);
exit;
}
if (preg_match("/onclick/i", $check)) {
$message = "Sorry this file is not valid";
$mklib->error_page($message);
exit;
}
if (preg_match("/onload/i", $check)) {
$message = "Sorry this file is not valid";
$mklib->error_page($message);
exit;
}
if (preg_match("/onsubmit/i", $check)) {
$message = "Sorry this file is not valid";
$mklib->error_page($message);
exit;
}
if (preg_match("#script(.+?)/script#ies", $check)) {
$message = "Sorry this file is not valid";
$mklib->error_page($message);
exit;
}
if (preg_match("/<?php/i", $check)) {
$message = "Sorry this file is not valid";
$mklib->error_page($message);
exit;
}
@fclose($check);