dimitris33

Try this tool https://developers.facebook.com/tools/debug/og/object?q=http%3A%2F%2Fwww.clashofclanspak.com%2F

which version of the file do you have at the moment? which version of WP do you have?

is this post.php file the original file or modified?

you can also disable your current theme and revert to a default one(if you have one) like 2013,2014.

to do that with ftp rename your current theme to something else.You can try this too.

for me the best thing to do is to, export your database, reinstall WP and import your database back, but it is better to find someone that can do this for you.

http://codex.wordpress.org/WordPress_Backups

Hi, editing core files like you did is a bad practice.I suggest you remove the file (if this is the only edit you made) and try to login again(find the original problem and fix it).

Here are some links to help you

https://codex.wordpress.org/Resetting_Your_Password
http://www.wpbeginner.com/plugins/how-to-deactivate-all-plugins-when-not-able-to-access-wp-admin/

I see that you have an error with the crayon plugin, did you look for an updated version of it?

Hi sleadeav

this is true, sometimes when you update WP plugins / scripts / themes break.Why this happens is because technology moves on and so the developers are introducing new functions /features in WordPress.The web is also changing (Chrome, Firefox etc) so again developers have to change their code.

Before a WP update the authors of plugins / themes have to update their code too.Usually they offer an updated version if there are any incompatibilities.

Best way to prevent problems is to stay updated for new versions of your plugins and contact their author when new WP versions are released.You can also have a staging site to test updates.

In my opinion it is easier to change the font size of the h1 headings, i am not sure how you created custom ones.

You can check this page https://support.woothemes.com/hc/en-us/articles/203106357-Add-Login-Logout-Links-To-The-Custom-Primary-Menu-Area

for example code.