Hey there! I have been having a problem with my theme editor all morning and after trying many 'solutions' that I have found here already, none of them have worked.
When I try to edit a theme file such as footer.php and click 'Update File', I get the message 'File edited successfully' whereas the code reverts back to what it was before I started to edit.
My file permissions for the file are set to 666, with the WP-Content, Themes and Default folders set to 755.
What is my problem and how do I fix it? :(