Drupal 6.x

I had a long struggle installing Drupal. The access to MySql had some issues. But it seems that I finally sorted it out.

Now I'm trying to get to know the administrationpage. But here's the next issue: often the links don't work. If I press a link the screen goes blank after some loading (for instance the "Extend" and "Content"). Sometimes I'm able to use the BACK-button in my browser but other times I have to do a reload of the page (http://127.0.0.1/drupal/admin/modules). Why is this happening?

I was upgrading drupal from drupal 6 to 7 and followed all the instructions. I have a backup of all the files from the server and the database. However after upgrade drupal 7 was not working, so I restored to drupal 6 by deleting everything from the root and replacing with files from the backup and restoring the database. However my site is still broken. My site is w3courses.com

I get the following error:

I took over a Drupal website and I need help converting the follow line of code frm preg_replace to preg_replace_callback.

return preg_replace('/&(#x?)?([A-Za-z0-9]+);/e', '_decode_entities("$1", "$2", "$0", $html_entities, $exclude)', $text);

Any help is greatly appreciated.

Thanks in advance

Evan

I know 6.x sites are very fast.

I made a website using 7.x version with many Views but it was tremendously slow. I worked 2-3 years on it to make fast and finally I've laid it off to die.

I've a very successful site on 6.x now will upgrading to 8.x will kill its speed? How slow it could become if I upgrade without any changes?

Is it possible to run 6.x to run on Ubutu 14 or 16?

Will any issues come? and how to solve them?

Good afternoon, I have a client who reached out to me today, and I am trying to find the login page for Drupal. I've scoured the internet and been unable to find exactly what to type in to find my login page. This page was created quite a while ago (circa 2009) and I don't know what version of Drupal it is. I can post the site link if it helps

I've tried:

example.com/?q=user
example.com/?q=users
example.com/?q=admin
example.com/?q=admin/login
example.com/admin
example.com/login
example.com/user
example.com/users