KC Tools is a WordPress plugin with several tools for "in deep" development and troubleshooting. It allows the reading of environment info, direct database access and terminal-like interface with server. It is locked by password to your browser only, so you can use it on live sites securely. It does nothing else - no output on pages, no shortcodes, no widgets, nothing, only a new row in "Settings" in Admin area.
|KC tools WP