PHP file is not refreshed after fwrite and fclose -

i doing following:

$configurationfile = fopen($configurationfilepath, 'w'); $result = fwrite($configurationfile, $newfilecontent); fflush($configurationfile); fclose($configurationfile); if ($result) {     echo '<pre>'; var_dump(require('file.php')); die(); ... 

and old data shown, though in editor or after page refresh can see new content.

how force php see new file content right after fclose?

thanks @engvrdr hint. problem opcache extension , ended 2 ways:

1. disable opcache:

   ini_set('opcache.enable', '0');

i wrote @ beginning of index file can tuned particular cases

2. make script run longer means of sleep() (pretty rough solution)