david/ruady-og-head
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generate Open Graph meta tags for category = Kurzgeschichten

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This commit is contained in:
David Madl
2026-03-01 20:52:30 +01:00
parent 3dd4aa6722
commit dea96e48fc
1 changed files with 50 additions and 30 deletions
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80
ruady-og-head.php
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@@ -1,18 +1,20 @@
<?php
/**
* Plugin Name: Per-Post Head HTML
* Description: Inserts generated HTML into the document head for the currently displayed singular post.
* Plugin Name: Ruady OG Head
* Description: Generates Open Graph tags for Social Media sharing (Facebook, Twitter/X, etc.)
* Version: 0.1.0
* Author: Your Name
* Author: David Madl
*/
// note: install by copying into wp-content/plugins/ruady-og-head/ruady-og-head.php
declare(strict_types=1);
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
final class Per_Post_Head_HTML {
final class Ruady_OG_Head {
public static function init(): void {
add_action( 'wp_head', [ __CLASS__, 'render_head_markup' ], 20 );
}
@@ -37,6 +39,10 @@ final class Per_Post_Head_HTML {
return;
}
if ( ! has_category( 'Kurzgeschichten', $post_id ) ) {
return;
}
$html = self::build_markup_for_post( $post );
if ( $html === '' ) {
@@ -46,10 +52,23 @@ final class Per_Post_Head_HTML {
echo "\n" . $html . "\n";
}
private static function make_description( string $text ): string {
$target_length = 150;
$parts = explode(' ', $text);
$lengths = array_map('strlen', $parts);
$total_length = 0;
$i = 0;
for ( ; $i < count($lengths); $i++ ) {
if ( $total_length + $lengths[$i] > $target_length ) break;
$total_length += $lengths[$i];
}
$desc = implode(' ', array_slice($parts, 0, $i));
$ellipsis = substr($desc, -1, 1) == '.' ? '' : ' ...'; // full sentences with a '.' don't need ellipsis '...'
return $desc . $ellipsis;
}
/**
* Build the head markup for one post.
*
* This is the function you will customize.
*/
private static function build_markup_for_post( WP_Post $post ): string {
// Example 1: conditionally emit markup only for a specific post type.
@@ -59,7 +78,13 @@ final class Per_Post_Head_HTML {
$post_url = get_permalink( $post );
$post_title = get_the_title( $post );
$excerpt = has_excerpt( $post ) ? get_the_excerpt( $post ) : '';
$excerpt = get_the_excerpt( $post );
$site_title = get_bloginfo( 'name' );
$site_url = site_url();
$site_url_p = parse_url($site_url);
$site_host = $site_url_p['host'];
$description = self::make_description(wp_strip_all_tags( $excerpt ));
// Example business logic:
// - add a meta tag for every post
@@ -68,36 +93,31 @@ final class Per_Post_Head_HTML {
ob_start();
?>
<meta name="description" content="<?php echo esc_attr( $description ); ?>">
<!-- Open Graph Meta Tags -->
<meta property="og:url" content="<?php echo esc_url( $site_url ); ?>">
<meta property="og:type" content="website">
<meta property="og:title" content="<?php echo esc_attr( $post_title ); ?> &#8211; <?php echo esc_attr( $site_title ); ?>">
<meta property="og:description" content="<?php echo esc_attr( $description ); ?>">
<!--<meta property="og:image" content="">--><!-- Load error, please check URL -->
<!-- Twitter Meta Tags -->
<meta name="twitter:card" content="summary_large_image">
<meta property="twitter:domain" content="<?php echo esc_attr( $site_host ); ?>">
<meta property="twitter:url" content="<?php echo esc_url( $site_url ); ?>">
<meta name="twitter:title" content="<?php echo esc_attr( $post_title ); ?> &#8211; <?php echo esc_attr( $site_title ); ?>">
<meta name="twitter:description" content="<?php echo esc_attr( $description ); ?>">
<!--<meta name="twitter:image" content="">-->
<!-- Per-Post Head HTML plugin -->
<meta name="x-post-id" content="<?php echo esc_attr( (string) $post->ID ); ?>">
<meta name="x-post-type" content="<?php echo esc_attr( $post->post_type ); ?>">
<link rel="canonical" href="<?php echo esc_url( $post_url ); ?>">
<?php if ( $excerpt !== '' ) : ?>
<meta name="description" content="<?php echo esc_attr( wp_strip_all_tags( $excerpt ) ); ?>">
<?php endif; ?>
<?php if ( $is_news ) : ?>
<script type="application/ld+json">
<?php
echo wp_json_encode(
[
'@context' => 'https://schema.org',
'@type' => 'NewsArticle',
'headline' => $post_title,
'url' => $post_url,
'datePublished' => get_post_time( 'c', true, $post ),
'dateModified' => get_post_modified_time( 'c', true, $post ),
],
JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE
);
?>
</script>
<?php endif; ?>
<?php
return trim( (string) ob_get_clean() );
}
}
Per_Post_Head_HTML::init();
Ruady_OG_Head::init();