It could be something with cookies. Try to clear your cookies in your browser and test again. If you can login after that, try to disable all plugins and enable the default WordPress-theme and successive enable your plugins to isolate the problem. Or it can be your .htaccess-file: Follow these easy steps and you’ll get … Read more
All I can say is when strange, WTF, moments happen like this, check your white-space or more appropriately ‘delete’ it. There was obviously a ASCII char that I couldn’t see mucking the whole thing.
You can override the action wp_ajax_dismiss-wp-pointer and user your own version of the function wp_ajax_dismiss_wp_pointer. add_action( ‘wp_ajax_dismiss-wp-pointer’, ‘override_ajax_pointer’, 1 ); function override_ajax_pointer() { // Your version of the function wp_ajax_dismiss_wp_pointer } This is the same technique used in this Q&A: Display custom list of tags in post/page editor with hooks and learned in this SO … Read more
I wouldn’t break my mind about which files are exactly mandatory to be replaced. Just replace wp-admin and wp-includes — if he just had access to your wordpress administration I would make sure to check all of the theme and plugins files which are accessible through the administration panel if he included base64 malware code … Read more
You need to open your header.php file and search in that file for this <p class=”footer”> some php will be here </p> You can delete that entire line or comment it out. You should be able to access the header.php file from the backend of WordPress. If you are not comfortable doing this, open the … Read more
&nonce should be ?nonce. The ? begins a query string, the & separates arguments within a query string.
You can control columns in most admin panels by clicking Screen Options at upper right of the screen and (un)checking them as you want. This is however saved individually for user and to get rid of column for all users would involve writing code to hook into internals and unregister it.
I suggest you to enable WP_DEBUG ‘ON’ to find out the error. You can enable WordPress debug editing wp-config.php file by adding define( ‘WP_DEBUG’, true ); Check the following document for better understanding https://codex.wordpress.org/Debugging_in_WordPress
You need to add a custom column to the user list screen like so: // Add a custom user column called Photo with a column key of user_photo // and re-arrange the columns array so our new column appears first. function add_user_columns( $defaults ) { $new_order = array(); foreach ( $defaults as $key => $title … Read more
as s_ha_dum said in the comments you could do something remove_menu_page However, the problem with this is it doesn’t actually prevent the user from editing the plugin if they know the url. From the codex: Removing a menu does not replace the need to filter a user’s permissions as appropriate. When I run into this … Read more