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_wp_preview_post_thumbnail_filter › WordPress Function

Seit4.6.0
Veraltetn/v
› _wp_preview_post_thumbnail_filter ( $value, $post_id, $meta_key )
Zugriff:
  • private
Parameter: (3)
  • (null|array|string) $value The value to return - a single metadata value, or an array of values.
    Erforderlich: Ja
  • (int) $post_id Post ID.
    Erforderlich: Ja
  • (string) $meta_key Meta key.
    Erforderlich: Ja
Gibt zurück:
  • (null|array) The default return value or the post thumbnail meta array.
Definiert in:
Codex:

Filters post thumbnail lookup to set the post thumbnail.



Ähnliche Funktionen: _wp_preview_meta_filter, _wp_preview_terms_filter, _wp_post_thumbnail_html, preview_theme_ob_filter, set_post_thumbnail_size

Quellcode 

function _wp_preview_post_thumbnail_filter( $value, $post_id, $meta_key ) {
	$post = get_post();

	if ( ! $post ) {
		return $value;
	}

	if ( empty( $_REQUEST['_thumbnail_id'] ) || empty( $_REQUEST['preview_id'] )
		|| $post->ID !== $post_id || $post_id !== (int) $_REQUEST['preview_id']
		|| '_thumbnail_id' !== $meta_key || 'revision' === $post->post_type
	) {
		return $value;
	}

	$thumbnail_id = (int) $_REQUEST['_thumbnail_id'];

	if ( $thumbnail_id <= 0 ) {
		return '';
	}

	return (string) $thumbnail_id;
}