Ticket #51073: 51073.diff

src/wp-admin/admin-header.php

@@ -198 +198 @@
         }
 }
 
+$error = error_get_last();
+
 // Print a CSS class to make PHP errors visible.
-if ( error_get_last() && WP_DEBUG && WP_DEBUG_DISPLAY && ini_get( 'display_errors' ) ) {
+if ( $error && WP_DEBUG && WP_DEBUG_DISPLAY && ini_get( 'display_errors' )
+        // Don't print the class for PHP notices in wp-config.php, as they happen before WP_DEBUG takes effect,
+        // and should not be displayed with the `error_reporting` level previously set in wp-load.php.
+        && ( E_NOTICE !== $error['type'] || 'wp-config.php' !== wp_basename( $error['file'] ) )
+) {
         $admin_body_class .= ' php-error';
 }
 
+unset( $error );
+
 ?>
 </head>
 <?php