How to Solve the \'You did not select a file to upload\' Error When Uploading Multiple Files in CodeIgniter?

Multiple File Uploads in CodeIgniter

Many web applications require the ability to upload multiple files at once. CodeIgniter makes this task straightforward with its built-in file upload library. However, there can be issues when handling multiple files with a single form element.

Issue:

In the provided example, an error message "You did not select a file to upload" is encountered when attempting to upload multiple files. This occurs because the file input field's name images[] is not correctly handled in the upload_files() method.

Solution:

To resolve this issue, we can modify the upload_files() method to accept the images[] name and handle the individual files accordingly:

private function upload_files($path, $title, $files)
{
    $config = array(
        'upload_path'   => $path,
        'allowed_types' => 'jpg|gif|png',
        'overwrite'     => 1,
    );

    $this->load->library('upload', $config);

    $images = array();

    foreach ($files['name'] as $key => $image) {
        $_FILES['images[]']['name'] = $files['name'][$key];
        $_FILES['images[]']['type'] = $files['type'][$key];
        $_FILES['images[]']['tmp_name'] = $files['tmp_name'][$key];
        $_FILES['images[]']['error'] = $files['error'][$key];
        $_FILES['images[]']['size'] = $files['size'][$key];

        $fileName = $title . '_' . $image;

        $images[] = $fileName;

        $config['file_name'] = $fileName;

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

        if ($this->upload->do_upload('images[]')) {
            $this->upload->data();
        } else {
            return false;
        }
    }

    return $images;
}

By updating the method, each file in the images[] array is correctly handled, resolving the error message and allowing multiple file uploads to function as intended.

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