以下是WordPress 4.9.2后端主页中adminbar呈现的回溯

array (
  \'file\' => \'wp-admin/index.php\',
  \'line\' => 100,
  \'function\' => \'include\',
)
array (
  \'file\' => \'wp-admin/admin-header.php\',
  \'line\' => 219,
  \'function\' => \'do_action\',
)
array (
  \'file\' => \'wp-includes/plugin.php\',
  \'line\' => 457,
  \'function\' => \'do_action\',
  \'class\' => \'WP_Hook\',
  \'type\' => \'->\',
)
array (
  \'file\' => \'wp-includes/class-wp-hook.php\',
  \'line\' => 310,
  \'function\' => \'apply_filters\',
  \'class\' => \'WP_Hook\',
  \'type\' => \'->\',
)
array (
  \'file\' => \'wp-includes/class-wp-hook.php\',
  \'line\' => 286,
  \'function\' => \'wp_admin_bar_render\',
)
array (
  \'file\' => \'wp-includes/admin-bar.php\',
  \'line\' => 92,
  \'function\' => \'render\',
  \'class\' => \'WP_Admin_Bar\',
  \'type\' => \'->\',
)
array (
  \'file\' => \'wp-includes/class-wp-admin-bar.php\',
  \'line\' => 263,
  \'function\' => \'_render\',
  \'class\' => \'WP_Admin_Bar\',
  \'type\' => \'->\',
)
array (
  \'file\' => \'wp-includes/class-wp-admin-bar.php\',
  \'line\' => 413,
)

array (
  \'file\' => \'index.php\',
  \'line\' => 17,
  \'function\' => \'require\',
)
array (
  \'file\' => \'wp-blog-header.php\',
  \'line\' => 19,
  \'function\' => \'require_once\',
)
array (
  \'file\' => \'wp-includes/template-loader.php\',
  \'line\' => 74,
  \'function\' => \'include\',
)
array (
  \'file\' => \'wp-content/themes/storefront/page.php\',
  \'line\' => 38,
  \'function\' => \'get_footer\',
)
array (
  \'file\' => \'wp-includes/general-template.php\',
  \'line\' => 76,
  \'function\' => \'locate_template\',
)
array (
  \'file\' => \'wp-includes/template.php\',
  \'line\' => 647,
  \'function\' => \'load_template\',
)
array (
  \'file\' => \'wp-includes/template.php\',
  \'line\' => 688,
  \'function\' => \'require_once\',
)
array (
  \'file\' => \'wp-content/themes/storefront/footer.php\',
  \'line\' => 36,
  \'function\' => \'wp_footer\',
)
array (
  \'file\' => \'wp-includes/general-template.php\',
  \'line\' => 2630,
  \'function\' => \'do_action\',
)
array (
  \'file\' => \'wp-includes/plugin.php\',
  \'line\' => 457,
  \'function\' => \'do_action\',
  \'class\' => \'WP_Hook\',
  \'type\' => \'->\',
)
array (
  \'file\' => \'wp-includes/class-wp-hook.php\',
  \'line\' => 310,
  \'function\' => \'apply_filters\',
  \'class\' => \'WP_Hook\',
  \'type\' => \'->\',
)
array (
  \'file\' => \'wp-includes/class-wp-hook.php\',
  \'line\' => 286,
  \'function\' => \'wp_admin_bar_render\',
)