在codeigniter中上传多张图片

<form method="post" action="<?php echo base_url('controller/upload_images'); ?>" enctype="multipart/form-data">
    <input type="file" name="userfile[]" multiple>
    <input type="submit" value="Upload">
</form>

public function upload_images()
{
    $this->load->library('upload');

    // 配置上传参数
    $config['upload_path'] = './uploads/';
    $config['allowed_types'] = 'gif|jpg|png';
    $config['max_size'] = 2048;

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

    // 执行上传操作
    if ($this->upload->do_upload('userfile')) {
        // 上传成功
        $data = $this->upload->data();
        // 可以根据需要进行进一步处理，如保存文件信息到数据库等
        echo "Upload successful!";
    } else {
        // 上传失败
        $error = $this->upload->display_errors();
        echo $error;
    }
}