Автозаполнение алт изображений на странице записей

Автозаполнение алт изображений на странице записей

function bygi_fill_alts_batch() {
    $offset = (int) get_option('bygi_alt_offset', 0);
    $limit = 25;

    $posts = get_posts([
        'post_type' => 'post',
        'post_status' => 'publish',
        'numberposts' => $limit,
        'offset' => $offset
    ]);

    if (empty($posts)) {
        delete_option('bygi_alt_offset');
        wp_clear_scheduled_hook('bygi_fill_alts_event');
        return;
    }

    foreach ($posts as $post) {
        $content = $post->post_content;

        libxml_use_internal_errors(true);
        $dom = new DOMDocument();
        $dom->loadHTML('<?xml encoding="utf-8" ?>' . $content);

        $xpath = new DOMXPath($dom);
        $imgs = $xpath->query('//img');

        foreach ($imgs as $img) {
            if ($img->getAttribute('alt')) continue;

            $headingText = '';
            $node = $img;

            while ($node) {
                while ($node->previousSibling) {
                    $node = $node->previousSibling;

                    if (in_array($node->nodeName, ['h2','h3','h4'])) {
                        $headingText = trim($node->textContent);
                        break 2;
                    }

                    if ($node->hasChildNodes()) {
                        foreach (['h2','h3','h4'] as $tag) {
                            $elements = $node->getElementsByTagName($tag);
                            if ($elements->length > 0) {
                                $headingText = trim($elements->item($elements->length - 1)->textContent);
                                break 3;
                            }
                        }
                    }
                }
                $node = $node->parentNode;
            }

            if ($headingText) {
                $img->setAttribute('alt', $headingText);
            }
        }

        $new_content = $dom->saveHTML();
        $new_content = preg_replace('~<(?:!DOCTYPE|/?(?:html|body))[^>]*>\s*~i', '', $new_content);

        if ($new_content !== $content) {
            wp_update_post([
                'ID' => $post->ID,
                'post_content' => $new_content
            ]);
        }
    }

    update_option('bygi_alt_offset', $offset + $limit);
}




add_action('bygi_fill_alts_event', 'bygi_fill_alts_batch');

add_action('admin_init', function() {
    if (!current_user_can('administrator')) return;
    bygi_fill_alts_batch();
});