wp-includes/class-wp-post.php:278Retrieve WP_Post instance.
$post_idintWP_Post|false public static function get_instance( $post_id ) { global $wpdb; $post_id = (int) $post_id; if ( $post_id <= 0 ) { return false; } $_post = wp_cache_get( $post_id, 'posts' ); if ( ! ( $_post instanceof stdClass ) && ! ( $_post instanceof WP_Post ) ) { $_post = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE ID = %d LIMIT 1", $post_id ) ); if ( ! $_post ) { return false; } $_post = sanitize_post( $_post, 'raw' ); wp_cache_add( (int) $_post->ID, $_post, 'posts' ); } elseif ( empty( $_post->filter ) || 'raw' !== $_post->filter ) { $_post = sanitize_post( $_post, 'raw' ); } return new WP_Post( $_post ); }Introduced in 3.5.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/class-wp-post.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.