这就是你要找的吗

add_filter(\'show_admin_bar\', \'__return_true\');

Codex

define( \'WP_DEBUG\', true ); // Or false
   if ( WP_DEBUG ) {
   define( \'WP_DEBUG_LOG\', true ); // writes errors down in wp-content/debug.log
   define( \'WP_DEBUG_DISPLAY\', true );  // shows errors on screen output, set false to on write into logfile
   @ini_set(\'display_errors\',1); // set to zero to disable displaying it and only writing to logfile
   define(\'SAVEQUERIES\', true); // will have a performance impact  so disable if not needed
   define(\'SCRIPT_DEBUG\', true); // Use dev versions of core JS and CSS files (only needed if you are modifying these core files)
}