You can add page-specific Open Graph tags to a WordPress site without a plugin by outputting them from a callback on the wp_head action. Put the callback in a child theme’s functions.php or another site-specific code component, use the current post’s title, URL, excerpt, and featured image, and check first that your theme or existing code is not already printing the tags. The method is the same for a site in India; set any locale to match the content rather than assuming every Indian site uses the same language.
What Open Graph tags do and where WordPress should print them
Open Graph metadata helps services that fetch a page build a link preview from its title, description, URL, and image. The tags belong in the document’s <head>. WordPress’s wp_head() function fires the wp_head action there, which makes that action the normal place to emit metadata. See the Open Graph protocol and the WordPress wp_head reference.
The protocol’s required properties are og:title, og:type, og:image, and og:url. It also describes og:description, og:locale, and og:site_name as generally recommended optional properties. When you provide an image, include og:image:alt describing it. See the protocol’s metadata specification.
Choose a maintainable implementation
For a site with multiple posts and pages, generate tags dynamically: a callback can use the current content’s values rather than repeating static values across the site. A static set of tags in a theme template can suit a genuinely single-page site, but it will not adapt automatically to different posts. WordPress documents functions for retrieving the current post’s excerpt and featured-image URL, which support a dynamic approach: get_the_excerpt() and get_the_post_thumbnail_url().
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Add the code to a child theme’s functions.php or a small site-specific code component you control. Avoid editing a parent theme directly, because a theme update can replace its files. The wp_head action is triggered in the theme’s head section by wp_head(); see the WordPress Theme Handbook.
Add dynamic Open Graph tags
Replace the fallback image URL below with a real image on your site that social crawlers can fetch publicly. The example outputs tags on singular posts and pages, uses the featured image when one exists, and falls back to the site description when the excerpt is empty. Review the behavior on your own site, especially if other code filters or formats excerpts.
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function site_output_open_graph_tags() {
if ( ! is_singular() ) {
return;
}
$post_id = get_queried_object_id();
$title = get_the_title( $post_id );
$url = get_permalink( $post_id );
$excerpt = get_the_excerpt( $post_id );
$image = get_the_post_thumbnail_url( $post_id, 'full' );
// Replace this with a real, publicly accessible image URL on your site.
if ( ! $image ) {
$image = 'https://example.in/path/to/default-share-image.jpg';
}
if ( ! $excerpt ) {
$excerpt = get_bloginfo( 'description' );
}
?>
<meta property="og:title" content="<?php echo esc_attr( $title ); ?>">
<meta property="og:type" content="website">
<meta property="og:url" content="<?php echo esc_attr( $url ); ?>">
<meta property="og:image" content="<?php echo esc_attr( $image ); ?>">
<meta property="og:image:alt" content="<?php echo esc_attr( $title ); ?>">
<meta property="og:description" content="<?php echo esc_attr( wp_strip_all_tags( $excerpt ) ); ?>">
<meta property="og:site_name" content="<?php echo esc_attr( get_bloginfo( 'name' ) ); ?>">
<?php
}
add_action( 'wp_head', 'site_output_open_graph_tags', 5 );get_the_post_thumbnail_url() returns a thumbnail URL or false when no image is available, so the fallback prevents an empty image value. get_the_excerpt() retrieves the post excerpt; an empty excerpt is possible. The code uses esc_attr() for dynamic values printed into HTML attributes, as recommended by its WordPress reference. It strips HTML tags from the excerpt before placing it in the description. The WordPress SEO documentation also discusses manually adding metadata and the plugin option: Search Engine Optimization.
The sample uses website as a general og:type. If you distinguish articles or other object types, choose the accurate protocol type for each page. To set a locale, use the protocol’s language_TERRITORY format, such as its documented default en_US; select a value that matches the actual language and region of the content. India alone does not determine one locale.
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Check for existing tags before adding another set
Themes, SEO or social plugins, and custom code can already emit Open Graph metadata. Before adding the callback, view the source of a representative post and the home page, then search for og:. For example, the WordPress Open Graph plugin listing describes a plugin that adds metadata to posts and pages.
If tags are already present, decide which output path should own the metadata: keep the existing one or remove/disable it before adding your own. The protocol allows repeated properties and says the first tag is preferred when values conflict, so duplicate output can produce an unintended preview. See the Open Graph protocol.
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Verify the output and troubleshoot common problems
- Save the code in the right place. Use a child theme’s
functions.phpor a site-specific code component. Do not paste PHP into the Customizer’s Additional CSS field; that field is for CSS. - Open the rendered page source. Check a post or page after deployment and search for
og:. Confirm the intended title, type, URL, image, and description appear in the head and that there is one coherent set. - Check values and accessibility. Confirm the URL is the page’s intended canonical address, the image URL resolves publicly without login or hotlink restrictions, and a page without a featured image receives the fallback.
- Check for PHP errors. If the page breaks or the tags do not appear, review the PHP syntax and your site’s error logs. A callback that is not loaded or a syntax error can prevent the output.
- Refresh cached previews when needed. Sharing services may retain an earlier preview. Use that service’s current official preview-refresh tool if available; refresh timing and tool availability vary.
- Tags are missing: confirm the callback is loaded, the page is singular, and the theme calls
wp_head()in its head template. - Tags appear twice: inspect theme, plugin, and custom-code output; disable or adjust the path you do not intend to use.
- The image is blank or wrong: check the featured image and fallback URL, then ensure the chosen image can be fetched publicly.
- Text or attributes look malformed: check that dynamic values use attribute escaping and inspect how excerpt filters format the value.
- The preview is stale: verify the current source first, then request a refresh through the sharing platform if it offers one.
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