# Page Details in the GTM dataLayer

> Pushes page information (page type, post type, categories, author, publish date and login status) to the dataLayer before Google Tag Manager loads, for use in tags and triggers.

- Type: PHP
- Runs: Frontend only
- Category: [Analytics & Tracking](https://wpide.com/library/category/analytics/)
- Tags: google-tag-manager, datalayer, content, segmentation
- Author: WPIDE Team
- Installs: 0
- Updated: 2026-10-28
- Page: https://wpide.com/library/analytics-gtm-page-datalayer/

## Code

```php
add_action( 'wp_head', function () {
    $data = array(
        'pageType' => is_front_page() ? 'home' : ( is_singular() ? 'single' : ( is_archive() ? 'archive' : ( is_search() ? 'search' : ( is_404() ? '404' : 'other' ) ) ) ),
        'loggedIn' => is_user_logged_in(),
    );

    if ( is_singular() ) {
        $post                   = get_queried_object();
        $data['postType']       = $post->post_type;
        $data['postId']         = $post->ID;
        $data['postAuthor']     = get_the_author_meta( 'display_name', $post->post_author );
        $data['postDate']       = get_the_date( 'Y-m-d', $post );
        $data['postCategories'] = wp_list_pluck( (array) get_the_category( $post->ID ), 'name' );
    } elseif ( is_category() || is_tag() || is_tax() ) {
        $data['termName']     = single_term_title( '', false );
        $data['termTaxonomy'] = get_queried_object()->taxonomy;
    }

    echo '<script>window.dataLayer = window.dataLayer || []; window.dataLayer.push(' . wp_json_encode( $data ) . ");</script>\n";
}, 1 );
```

## Notes

Create Data Layer Variables in GTM for the keys you need, for example pageType or postCategories.

## How to use it

Install the free WPIDE plugin (https://wordpress.org/plugins/wpide/), find "Page Details in the GTM dataLayer" in its snippet library and add it in one click; or create a new PHP snippet in WPIDE (or any code snippets plugin) and paste the code above. More snippets: https://wpide.com/library/