php upload script

gistfile1.php

<?php
$file_size_limit = 5242881;
$types_allowed = array('image/jpeg', 'image/jpg', 'image/gif', 'image/png');
$location = 'uploads/';
$normal = 200;
$small = 50;
 
function resize_image($width_height, $folder_path) {
 
    global $location, $rand_filename, $image_path;
 
    if (isset($rand_filename, $location)) {
 
        $image_path = $location . $rand_filename;
 
 
        if (file_exists($image_path)) {
 
 
            $image_size = getimagesize($image_path);
            $image_width = $image_size[0];
            $image_height = $image_size[1];
 
            if ($old_image = @imagecreatefromjpeg($image_path)) {
 
            } elseif ($old_image = @imagecreatefromgif($image_path)) {
 
            } else if ($old_image = @imagecreatefrompng($image_path)) {
 
            } else {
                echo 'Image upload error.<br/>';
                return false;
            }
 
 
            $offset = strpos($rand_filename, '.');
            $result_image_name = $folder_path . $rand_filename;
 
 
 
            if ($image_height > $image_width) {
                $greater_axe = $image_height;
                $smaller_axe = $image_width;
            } else {
                $greater_axe = $image_width;
                $smaller_axe = $image_height;
            }
 
 
 
            $x = ($image_width - $smaller_axe) / 2;
            $y = ($image_height - $smaller_axe) / 2;
 
 
 
            $image_croped = imagecreatetruecolor($width_height, $width_height);
            if (@!imagecopyresampled($image_croped, $old_image, 0, 0, $x, $y, $width_height, $width_height, $smaller_axe, $smaller_axe)) {
                echo 'Function error.<br/>';
                return false;
            }
 
 
 
            if (@imagejpeg($image_croped, $result_image_name)) {
 
                return true;
            } else {
 
                echo 'Image upload error.<br/>';
                return false;
            }
        } else {
            echo 'Picture does not exist.<br/>';
            return false;
        }
    } else {
 
        echo 'Upload error.<br/>';
        return false;
    }
}
 
if (!empty($_FILES["pic"])) {
 
    foreach ($_FILES["pic"]["error"] as $key => $error) {
        if ($error == UPLOAD_ERR_OK) {
            if (isset($_FILES['pic']['name']) && !empty($_FILES['pic']['name'])) {
                $name = $_FILES['pic']['name'];
                $tmp_name = $_FILES['pic']['tmp_name'];
                $file_size = $_FILES['pic']['size'];
                $type = $_FILES['pic']['type'];
 
                $errors = array();
                $counter = 0;
                do {
                    $rand_filename = rand(10000, 99999) . '.jpeg';
                    $uniq_name = $location . $rand_filename;
                    $location_contents = scandir($location);
                    $counter++;
                    if ($counter > 99999) {
                        echo 'Can not find a unique name.<br/>';
                        $errors[] = '1';
                    }
                } while (in_array($rand_filename, $location_contents));
 
 
 
                if ($file_size > $file_size_limit) {
                    echo 'Image is to big - 5Mb<br/>';
                    echo $file_size.' > '.$file_size_limit;
                    $errors[] = '1';
                }
 
 
                if (!in_array($type, $types_allowed)) {
                    echo 'Onely image file';
                    $errors[] = '1';
                }
 
 
                if (empty($errors)) {
                    if (move_uploaded_file($tmp_name, $uniq_name)) {
 
 
                        if (resize_image($normal, 'uploads/normal/') && resize_image($small, 'uploads/small/')) {
 
                            echo 'Viss ok!';
                        } else {
                            //unlink($image_path);
                        }
                    } else {
                        echo 'Function error, please try later.<br/>';
                    }
                }
            } else {
                echo 'Please select image';
            }
        }
    }
}