CodeIgniter Custom Uploads #libraries

myuploads.php

<?php

public function myupload($file_name, $opt) {
        $this->load->helper('directory');

        $opt_folder_uploads = ( ($opt["opt_folder_uploads"] == NULL) || ($opt["opt_folder_uploads"] == "") ? "./media/uploads/news/" . date("Y-m") : $opt["opt_folder_uploads"] );
        $opt_input_text_name = ( ($opt["opt_input_text_name"] == NULL) || ($opt["opt_input_text_name"] == "") ? "userfile" : $opt["opt_input_text_name"] );
        $opt_type = ( ($opt["opt_type"] == NULL) || ($opt["opt_type"] == "") ? "images" : $opt["opt_type"] );
        $opt_prefix = ( ($opt["opt_prefix"] == NULL) || ($opt["opt_prefix"] == "") ? NULL : $opt["opt_prefix"] );
        $opt_suffix = ( ($opt["opt_suffix"] == NULL) || ($opt["opt_suffix"] == "") ? NULL : $opt["opt_suffix"] );
        $opt_maxsize = ( ($opt["opt_maxsize"] == NULL) || ($opt["opt_maxsize"] == "") ? "50000" : $opt["opt_maxsize"] );
        $opt_max_width = ( ($opt["opt_max_width"] == NULL) || ($opt["opt_max_width"] == "") ? "1024" : $opt["opt_max_width"] );
        $opt_max_height = ( ($opt["opt_max_height"] == NULL) || ($opt["opt_max_height"] == "") ? "768" : $opt["opt_max_height"] );

        if (!is_dir($opt_folder_uploads)) {
            mkdir($opt_folder_uploads, DIR_WRITE_MODE, true);
        }
        exec("sudo chmod 777 " . $opt_folder_uploads);
        $config['upload_path'] = $opt_folder_uploads;
        $config['remove_spaces'] = FALSE;

        switch ($opt_type) {
            case "images":
                $config['allowed_types'] = 'gif|jpg|png|JPG|PNG';
                $config['max_width'] = $opt_max_width;
                $config['max_height'] = $opt_max_height;
                break;
            case "video":
                $config['allowed_types'] = 'mkv|avi|flv|mp4|mpg|mpeg|wmv';
                break;
            case "doc":
                $config['allowed_types'] = 'doc|docx|xls|xlsx|txt|rtf';
                break;
            case "audio":
                $config['allowed_types'] = 'mp2|mp1|midi|wav|mp3';
                break;
        }
        $config['max_size'] = $opt_maxsize;

        $name = "";

        if ((($opt_prefix == NULL) || ($opt_prefix == "")) && (($opt_suffix == NULL) || ($opt_suffix == ""))) {
            $name = $file_name["name"];
        }

        if ((($opt_prefix == NULL) || ($opt_prefix == "")) && (($opt_suffix != NULL) || ($opt_suffix != ""))) {
            $name = $file_name["name"] . $opt_suffix;
            echo substr($file_name["name"], strrpos($file_name["name"], '.') + 1);
        }

        if ((($opt_prefix != NULL) || ($opt_prefix != "")) && (($opt_suffix != NULL) || ($opt_suffix != ""))) {
            $name = $opt_prefix . basename($file_name["name"], substr($file_name["name"], strrpos($file_name["name"], '.'))) . $opt_suffix . '.' . pathinfo($file_name["name"], PATHINFO_EXTENSION);
        }

        if ((($opt_prefix != NULL) || ($opt_prefix != "")) && (($opt_suffix == NULL) || ($opt_suffix == ""))) {
            $name = $opt_prefix . $file_name["name"];
        }

        $config['file_name'] = $name;
        $config['file_path'] = $file_name["tmp_name"];

        $this->load->library('upload', $config);
        $this->upload->initialize($config);
        $filesupload = "";
        if (!$this->upload->do_upload($opt_input_text_name)) {
            $error = array('error' => $this->upload->display_errors());
            $error = array_filter($error);
            $filesupload = $error;
        } else {
            $filesupload = $opt_folder_uploads . '/' . $config['file_name'];
        }

        if (($filesupload == "") || (@empty($filesupload)) || ($filesupload == null)) {
            return "empty";
        }
        if (is_array($filesupload)) {
            if (array_key_exists("error", $filesupload)) {
                return "error" . $filesupload["error"];
            }
        } else {
            return $filesupload;
        }
    }

?>


<?php
// Controllers
$folder_uploads = './media/uploads/news/' . date('Y-m');

            $options_upload = array(
                "opt_folder_uploads" => $folder_uploads,
                "opt_input_text_name" => "userfile",
                "opt_type" => "images",
                "opt_prefix" => "test-",
                "opt_suffix" => "-ok",
                "opt_maxsize" => "",
                "opt_max_width" => "",
                "opt_max_height" => "",
            );

            $photo = ($_FILES['userfile']['name'] != "") ? $this->myupload($_FILES['userfile'], $options_upload) : "empty";
            echo $photo; 
            // will give return string value "error", "empty", "filename"
?>

<form method="post" action="controller/action" enctype="multipart/form-data">
<input type="file" name="userfile" id="userfile" />
<button type="submit">Save</button>
</form>