Can’t find where to modify attrbitutes

If you can’t edit your header.php, or would prefer not to, most decent WordPress themes should have (and certainly any that pass theme review to be in the official repository)

<html <?php language_attributes();?> >

in the opening html tag in the header.php template.

There is a filter in the language_attributes() function that allows plugins/child themes to modify the ouput, like so:

function wpa89133( $output ) {
    $output .= ' myprop1="val1" myprop2="val2"';
    return $output;
}
add_filter( 'language_attributes', 'wpa89133' );

Related Posts:

  1. Custom plugin – $post_id in wp_head
  2. Modifying meta tags after doing ajax call in plugin
  3. making a plugin that moves other plugins wp_head actions to wp_footer
  4. Include HTML (Bootstrap Modal Box) with a plugin into my header
  5. How to replace the existing metatag using the backend to insure a thumbnail image gets fetched when we share on social media?
  6. How do I get a reference to the HTML memory buffer while the page is being constructed?
  7. Reading the inside of
  8. Get page content using slug
  9. How to include wp-load.php from any location?
  10. Correct way to enqueue jquery-ui
  11. How to echo the_excerpt without the P tag wrapper?
  12. How can I update a wordpress plugin from a Git repository (github)
  13. Is There a Plugin Life Cycle Documentation?
  14. What is an alternative method to the WordPress private _doing_it_wrong() function
  15. Shortcode adding p and br tags
  16. Using AJAX in a plugin to submit form – REALLY confused
  17. Problems with localization
  18. Install and load additional plugins when running unit tests
  19. Having Problem On Getting WP Post Gallery Images URL
  20. How do I hook a custom discount to change a WC_Order price total on WooCommerce?
  21. Properly licensing a plugin that uses Apache 2.0 licensed code
  22. How to restrict plugin’s sub-menu pages to admin/subscribers?
  23. Can I dynamically create a link to my plugin settings/options page from my plugin description?
  24. How to load the plugin only when logged in?
  25. Self-hosted plugin update problems
  26. Saving data from block editor to the database
  27. Cannot search post by taxonomy
  28. Hook into theme-switching later than `setup_theme`
  29. Save image as featured image
  30. Best choice of options/settings framework for plugin/theme development
  31. OOP Plugin and Menu – Call to undefined function register_setting()
  32. Will current_theme_supports return TRUE with a nonstandard add_theme_support?
  33. WP AJAX is not working, always returns 0
  34. Act on user meta updated, but only once
  35. get_pages Drop down list for selection of a page
  36. Admin auto-refresh is interfering with Firebug — how to prevent it?
  37. Hide plugin dashboard menu item for specific roles
  38. Display content from custom post without modifying the single template
  39. How do I add custom column to woocommerce cart?
  40. WordPress mode for emacs?
  41. Widget translation on my plugin
  42. Upload to a remote server using wp_remote_post
  43. Loading WordPress Admin Environment
  44. how to add custom functionality after woocommerce place order button
  45. Problems with: manage_${post_type}_posts_columns
  46. Make WordPress cache permanent for some pages until edited
  47. Getting timestamp of activation plugin time
  48. conditionally load javascript & CSS for do_action() calls from plugin
  49. Rich text editor settings persist throughout all rich text editors
  50. Function: Add link to / inside div
  51. How can I rewrite a URL to pass requests to a custom method via AJAX? (I can’t use admin-ajax.php)
  52. WP Gutenberg Blocks – How to limit first/root blocks
  53. The plugin does not save data
  54. How do I create plugin or theme using MVC pattern?
  55. Create custom HTML/JS app inside page
  56. How to Get Current Custom Post Type Associated Taxonomy Term
  57. tinymce.get() returns error after ajax request
  58. Access bloginfo, get_option, and plugins_url from a non-core php file
  59. Upload multiple images and insert them into custom html code
  60. wp_schedule_event() set daily, but processed every second
  61. Can’t get AJAX call working in custom plugin
  62. Empty Pdf file generated with FPDF library in WordPress plugin [closed]
  63. $wpdb->update() always need a second try
  64. Why aren’t some plugin styles loading when I load a template?
  65. Pagination not working with custom wp_query
  66. My plugin won’t create table in wordpress 3.5
  67. Remove Permalink Meta Box not working?
  68. WordPress actions for plugin admin UI page
  69. wp_insert_user keeps echoing values
  70. Getting posts by taxonomy
  71. Pause plugin option page until all data manipulation is complete
  72. Modify custom block plugin without losing content
  73. Exclude Woocommerce Product Category From Sitemap
  74. apply_filters() and call_user_func() to define and call a function outside a class
  75. How to show only the last two categories in a menu?
  76. HTML Elements in my WP Plugin being generated in JS. Security and Translated Text Question about this method being used
  77. howTo let wordpress endpoint return html-page
  78. Sanitization and validation input fields – Settings API
  79. User meta query using Wildcard
  80. use a (Polymer) web component within a plugin (or theme)?
  81. Warning: Illegal string offset ‘Andorra’ in … on line 106
  82. wp_ajax add_action fuction won’t fire on custom jQuery action
  83. wordpress4.8.2 Multilingual Plugin
  84. Customize WordPress Admin Menu
  85. Dedicated server and WPDB Class : huge slow-down of the website
  86. $wpdb how can i save my postmeta table before querying it
  87. Create dedicated page with custom template showing custom data
  88. How can I see a varibles value when my plugin runs?
  89. Add Button to TinyMCE Custom Menu
  90. How should I use wpdb class to submit a form in admin dashboard?
  91. WordPress plugin: admin-ajax.php not passing data to custom function
  92. How do I replace title with my plugin?
  93. Create pages for authors
  94. How do I create Widget within plugin that uses its own class?
  95. Looking for Hook that is fired after a plugin or wp upgrade is installed/updated
  96. How to design WooCommerce-like admin tabs for plugin settings page?
  97. Woocommerce: block user removing cart item
  98. How can I dynamically change title and description in WordPress?
  99. Load images from CDN and custom features to “Add Media” dialogue
  100. Saving metabox updates causing fatal error