Multiple files uploading not working in Codeigniter

Question

While uploading the multiple files in codeigniter i am getting error like this,

Fatal error: Unsupported operand types in .../system\libraries\Upload.php

if(isset($_FILES['med_file']))
            {
                $config['upload_path'] = './medical_history_doc/';
                $config['allowed_types'] = 'jpg|jpeg|png|doc|docx|pdf|txt';
                $this->load->library('upload', $config);

                $files = $_FILES;
                $cpt = count($_FILES['med_file']['name']);

                for($i=0; $i<$cpt; $i++)
                {
                    if($files['med_file']['name'][$i] !="")
                    {

                        $_FILES['med_file']['name']= $files['med_file']['name'][$i];
                        $_FILES['med_file']['type']= $files['med_file']['type'][$i];
                        $_FILES['med_file']['tmp_name']= $files['med_file']['tmp_name'][$i];

                        $attachment_name=$files['med_file']['name'][$i];
                        $path_info=pathinfo($attachment_name);
                        $file_extension=@$path_info['extension'];
                        $path_part_filename=$path_info['filename'];
                        $rename_file=str_replace(" ","",$path_part_filename).'_'.date('Ymdhis');

                        if(!empty($rename_file))
                        {

                            $_FILES['med_file']['name'] = $rename_file.'.'.$file_extension;
                            $medical_history_files[]=$rename_file.'.'.$file_extension;
                            if($this->upload->do_upload('med_file'))
                            {
                                $file_upload='true';

                            }
                            else if(!$this->upload->do_upload('med_file'))
                            {
                                $file_upload="fail";
                                $error= $this->upload->display_errors();

                                $this->session->set_flashdata('sucess', $error);
                            }
                          }
                        }
                    }
                }
            }

and my view page code is like this.

<form method="post" name="medicalhistory" id="medicalhistory"
            enctype="multipart/form-data">
<input id="med_file" type="file" name="med_file[]" multiple>
</form>

Please help me how to solve this problem. Thanks

Answer 1

You missed a couple of things here.. First of all, your HTML form should have the attribute action pointing to your controller method. Second, the $_FILES array should always contain the following: name, type, tmp_name, error, size, however, in your loop you are only rebuilding with name, type, tmp_name, and you are forgetting the others. You are also renaming the file prior its being sent to the upload library. You should do this by setting it in the config array that is being sent to the library. I would redo you code in the following manner:

Step 1: Make sure the HTML form has the action attribute:

<form action="<?= base_url()?>controller/upload" ..

Step 2: Retrieve the files and unset the original $_FILES so that you can rebuild the array:

$uploaded_files = $_FILES['med_file'];
unset($_FILES);

Step 3: loop through the obtained files and rebuild the $_FILES array into a multidimensional array:

foreach ($uploaded_files as $desc => $arr) {
    foreach ($arr as $k => $string) {
        $_FILES[$k][$desc] = $string;
    }
}

Step 4: Load the Upload library, and set your config options

$this->load->library('upload');
$config['upload_path'] = './medical_history_doc/';
$config['allowed_types'] = 'jpg|jpeg|png|doc|docx|pdf|txt';

Step 5: Loop through the new $_FILES array, rename you file and set the config['filename'] to the new name. Initialize your upload, then run it:

foreach ($_FILES as $k => $file) {
    $path_info = pathinfo($file["name"]);
    $file_extension = $path_info['extension'];
    $path_part_filename = $path_info['filename'];
    $config['file_name'] = str_replace(" ", "", $path_part_filename) . '_' . date('Ymdhis') . '.' . $file_extension;

    $this->upload->initialize($config);

    if (!$this->upload->do_upload($k)) {
        $errors = $this->upload->display_errors();
        var_dump($errors);
    } else {
        var_dump("success");
    }

}

---

FINAL RESULT:

View:

<form action="<?= base_url()?>controller/upload" method="post" id="medicalhistory" enctype="multipart/form-data">
    <input id="med_file" type="file" name="med_file[]" multiple>
    <input type="submit">
</form>

Controller:

public function upload() {
    $uploaded_files = $_FILES['med_file'];
    unset($_FILES);

    foreach ($uploaded_files as $desc => $arr) {
        foreach ($arr as $k => $string) {
            $_FILES[$k][$desc] = $string;
        }
    }

    $this->load->library('upload');
    $config['upload_path'] = './medical_history_doc/';
    $config['allowed_types'] = 'jpg|jpeg|png|doc|docx|pdf|txt';

    foreach ($_FILES as $k => $file) {
        $path_info = pathinfo($file["name"]);
        $file_extension = $path_info['extension'];
        $path_part_filename = $path_info['filename'];
        $config['file_name'] = str_replace(" ", "", $path_part_filename) . '_' . date('Ymdhis') . '.' . $file_extension;

        $this->upload->initialize($config);

        if (!$this->upload->do_upload($k)) {
            $errors = $this->upload->display_errors();
            var_dump($errors);
        } else {
            var_dump("success");
        }

    }
}