Upload script

<?php
session_start();
include('includes/functions.php');
error_report(true);
ieNote(true);

// Make sure the form was submitted
if (isset($_POST['sent']) || $_POST['sent'] == true && isset($_FILES['file']))
{
    $limit = 0;
    foreach ($_FILES['file']['tmp_name'] as $key => $tmp_name)
    {
        if ($limit <= 10)
        {
            // Main variables
            $filename   = rand(124588, 543354) . $_FILES['file']['name'][$key];
            $filename   = str_replace(' ', '_', $filename);
            $url        = str_replace('www.', '', url());

            // Get extension
            $extension  = substr($filename, -3);
            $extrule    = $extension == 'png' || $extension == 'jpg' || $extension == 'gif' || $extension == 'peg' || $extension == 'bmp' || $extension == 'ico' ||
                          $extension == 'PNG' || $extension == 'JPG' || $extension == 'GIF' || $extension == 'PEG' || $extension == 'BMP' || $extension == 'ICO';
            $fileSize   = $_FILES['file']['size'][$key];

            if ($fileSize <= 10485760)
            {
                if ($extrule)
                {
                    $thumbsize  = (!empty($_POST['tsize'])) ? $_POST['tsize'] : 110;

                    // Main URL variables
                    $i          =  $url . 'i/' . $filename . "\n";
                    $direct     =  $url . 'i/' . $filename;
                    $image      =  'i/' . $filename;

                    if (!file_exists($image))
                    {
                        // Move uploaded file
                        $move_image = move_uploaded_file($tmp_name, 'i/' . $filename);

                        // Generate thumbnail
                        generate_thumbnail($direct, $filename, $thumbsize, $thumbsize, true, 'file', false, false, 't/');
                        $t      = $url . 't/' . $filename;
                        $thumb  = 't/' . $filename;

                        // If the user seeks a resize, then let generate_thumbnail(); handle it
                        $resize = generate_thumbnail($direct, 'r' . $filename, $_POST['resize'], $_POST['resize'], true, 'file', false, false, 'i/');
                        $r      = $url . 'i/' . 'r' . $filename . "\n";

                        if ($resize)
                        {
                            unlink($image);
                        }
                    }
                    if(!empty($_POST['resize']))
                    {
                        $links[] = array('direct' => $r, 'thumb' => $t);
                    }
                    else
                    {
                        $links[] = array('direct' => $direct, 'thumb' => $t);
                    }
                }
            }
        }
    }
}
else
{
    header('Location: index.php');
}
?>