Output photos to two sites, from one folder, and upload photos from two sites to one folder ci?

Question

MySQL

How to implement this?
Two identical scripts are made, with different domains.
Purpose: Displaying photos on two sites, from one folder of the first site, and uploading photos from two sites to one folder of the first site. "so as not to fill the server with photo copies"
If this is possible...?
The Codeigniter framework
has some code:

// Check if the directory already exists
        	if (!file_exists("./uploads/photos/" . $user_id . "/")) {
        		mkdir("./uploads/photos/" . $user_id . "/");
        		mkdir("./uploads/photos/" . $user_id . "/thumbnails/");
        	}
        	
        	// Copy the file to the correct directory
      if (!empty($_FILES))
      {
        $nameFile 	= rand(0,999999).time();
          $tempFile 	= $_FILES['upl']['tmp_name'];
          $fileSize 	= $_FILES['upl']['size'];
          $fileTypes 	= array('jpg','jpeg','png', 'JPG', 'JPEG', 'PNG'); // File extensions
          $fileParts 	= pathinfo($_FILES['upl']['name']);
          $targetPath = "./uploads/photos/" . $user_id . "/";
          $targetPathThumb = $targetPath . "thumbnails/";
          $targetPathEcho = "/uploads/photos/" . $user_id . "/";
          $targetPathEchoThumb = "/uploads/photos/" . $user_id . "/thumbnails/";
          $targetFile =  str_replace('//','/',$targetPath) . $nameFile . "." . $fileParts["extension"];
          $targetFileThumb = str_replace('//','/',$targetPathThumb) . $nameFile . "." . $fileParts["extension"];
          $targetFileEcho = str_replace('//','/',$targetPathEcho) . $nameFile . "." . $fileParts["extension"];
          $targetFileEchoThumb = str_replace('//','/',$targetPathEchoThumb) . $nameFile . "." . $fileParts["extension"];
      
        if($fileSize <= 7000000)
        {

and like this:

// you can insert the result into the database if you want.
        if($this->is_image($extension)) 
        {
            $config['image_library']  = 'gd2';
            $config['source_image']   = './uploads/'.$filename;
            $config['new_image']      = './uploads/thumbs/';
            $config['create_thumb']   = TRUE;
            $config['maintain_ratio'] = TRUE;
            $config['thumb_marker']   = '';
            $config['width']   = 300;
            $config['height']   = 300;

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

            $this->image_lib->resize();
            echo 'image';
        }
        else echo 'file';
    }

Answer 1

Делаете симлинк в одном из сайтов на папку в другом сайте.