在第579行的... / public_html / includes / menu.inc中调用未定义的函数menu_load（）

I really need your help. Actually, my journey begin with the installation Drupal and some modules. After a couple of days I suddenly get an issue "500 Internal Server Error".

I asked my hosting provider why this happened, he said "That because of the file .htaccess and you should add to this file php display error". So i did this and I get a new issue :

"Fatal error: Call to undefined function menu_load() in ...
/public_html/includes/menu.inc on line 579."

By the way, that's line 579

else {$return = $function($value);}

P.S: I am a beginner in PHP. I like Drupal a lot and want to study Drupal in further and create cool sites, but this problem...

need to figure out what function it's trying to call first. change the line

else {$return = $function($value);}

to

 else {echo $function;exit;$return = $function($value);}

Here are few tips:

  • make sure your Drupal core has all the files in the right place (especially menu module),
  • make sure your imported database is in UTF-8 format,
  • upgrade your Drupal core to the latest version (drush fr && drush up drupal)
  • clear all your caches (drush -y cc all), including your memcached (killall memcached),
  • rebuild your registry by using [Registry Rebuild][1],
  • if you're using modules which are implementing drupal_bootstrap() (such as Secure Site), disable them,
  • try disabling your PHP cache engines (such as XCache, Zend optimizer) to see if that's the problem,
  • test it on different environment/machine,
  • eventually restore your database from the point where it was working before