You can enable WordPress debug without displaying the messages publicly to the site visitors.
You can enable WordPress debug in WordPress by adding
set_error_handler(function() { $log = " ******************** TRACE: "; foreach ( debug_backtrace() as $i => $item ) { if ( 0 === $i ) { $log .= " " . $item['args'][1]; } else { if(isset($item['file'])){ $log .= " " . $item['file'] . ' — line ' . $item['line']; } } } $log .= "***********************"; error_log( $log ); return true; }, E_ALL); define('WP_DEBUG', true); define('WP_DEBUG_LOG', true); define( 'WP_DEBUG_DISPLAY', false );
to the wp-config.php file.
WordPress debug messages are logged without displaying to your site visitors.
You can find wp-config.php in your WordPress directory and copy and paste the 3 lines above in that file. Make sure none of the lines are repeated in the file.
You can then find the debug.log file in the WordPress wp-content directory.