Include php files the correct way

Question

/* index.php */
require_once('region.php');
require_once('es.php');

• index.php includes region.php -region-related info (also sets $regionLang = 'es';) and es.php -mostly Spanish translations. Second file needed if language is Spanish 'es' or it would be a different file e.g. 'en-us.php'
• would you include es.php inside region.php and why? Also how?
  • region.php is essential, es.php is important but scripts will run withot translations
  • whatever language is used in region.php, the corresponding translation file will be required
  • require() or include() in case of es.php?

/* index.php */
require_once('region.php');

/* region.php */
require_once('es.php');

Answer 1

I would include es.php into region.php

Because, region.php decide my language whether it is spanish or not. If it is not my language, i can change the language file

We suppose in region.php;

//region.php    
    if(myRegion()=="Turkey"){
      require_once('turkish.php');
    }else if(myRegion()=="Spania"){
      require_once('es.php');
    }

so we avoid unnecessary file loads