resize and unlink file question

Hello thanks again for your advice I found that this code below works more better using RecursiveDirectoryIterator and RecursiveIteratorIterator all new to me

PHP Code:

public function resize($filename, $width, $height) { 
        
    $this->load->library('image_lib');

    $old_file = FCPATH . 'images/' . $filename;

    $extension = pathinfo($filename, PATHINFO_EXTENSION);

    $extended_image = substr($filename, 0, strrpos($filename, '.')) . '_thumb-' . $width . 'x' . $height . '.' . $extension;
        
    $new_file = FCPATH . 'images/cache/' . $extended_image;

    $this->load->helper('directory');

    $get_directory = $this->input->get('image_directory');

    $path = FCPATH . 'images/cache/catalog/';

    $dir = new RecursiveDirectoryIterator(FCPATH . 'images/cache/', FilesystemIterator::SKIP_DOTS);
        
    // Flatten the recursive iterator, folders come before their files
    $cached_images  = new RecursiveIteratorIterator($dir,
            RecursiveIteratorIterator::SELF_FIRST);
    
    foreach ($cached_images as $image => $object) { 

        $original_image_file = str_replace('_thumb-' . $width . 'x' . $height, '', $image);
            $original_image_short_path = str_replace(FCPATH . 'images/cache\\', '', $original_image_file);
            
        if (!file_exists(FCPATH . 'images/' . $original_image_short_path)) {
            @unlink($image);
        }
                    
    }

    if (!is_file($new_file) || (filectime($old_file) > filectime($new_file))) {

        if (!is_dir($old_file)) {
            @mkdir(FCPATH . 'images/cache/'. dirname($filename), 0777);
        }
            
        $config['image_library'] = 'gd2';
        $config['source_image'] = $old_file;
        $config['maintain_ratio'] = FALSE;
        $config['width'] = $width;
        $config['height'] = $height;
        $config['new_image'] = $new_file;

        $this->image_lib->clear();
        $this->image_lib->initialize($config);
        $this->image_lib->resize();

    }


    return base_url('images/cache/' . $extended_image);
} 


There's only one rule - please don't tell anyone to go and read the manual.  Sometimes the manual just SUCKS!