WordPress theme editor is missing

wordpress themes admin

It is probably because of iThemes Security and its settings. So yeah, just go to wp-config and change DISALLOW_FILE_EDIT to false.

define( 'DISALLOW_FILE_EDIT', false );

Or just switch it off here:Dashboard -> Security -> WordPress Tweaks -> Configure Settings

Uncheck: Disable File Editor

wordpress themes admin

Open up your wp-config.php file, and search for

define('DISALLOW_FILE_EDIT', true);

Change true to false:

define('DISALLOW_FILE_EDIT', false);

wordpress themes admin

To enable the theme editor, follow these steps:

Go to Appearance, select one theme (any one you like) and activate it.
In this activated theme, go to Appearance → Editor → select the theme to edit (on the top right, above Templates. There is a drop-down click on it and select your previous theme.)
Now select config.php or demo config.php and remove the define ( 'DISALLOW_FILE_EDIT, true); code.
Now click on Update file.
Now change the theme to your previous theme.

Now you can find your editor in the Appearance drop-down.

CodeHunter