: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in
namespace Yoast\WP\SEO\Integrations\Admin;
use Yoast\WP\SEO\Actions\Indexing\Post_Link_Indexing_Action;
use Yoast\WP\SEO\Conditionals\Admin\Posts_Overview_Or_Ajax_Conditional;
use Yoast\WP\SEO\Conditionals\Admin_Conditional;
use Yoast\WP\SEO\Conditionals\Should_Index_Links_Conditional;
use Yoast\WP\SEO\Helpers\Post_Type_Helper;
use Yoast\WP\SEO\Integrations\Integration_Interface;
* Link_Count_Columns_Integration class.
class Link_Count_Columns_Integration implements Integration_Interface {
public const COLUMN_LINKED = 'linked';
public const COLUMN_LINKS = 'links';
protected $post_type_helper;
* @var Post_Link_Indexing_Action
protected $post_link_indexing_action;
* The admin columns cache.
* @var Admin_Columns_Cache_Integration
protected $admin_columns_cache;
public static function get_conditionals() {
Admin_Conditional::class,
Posts_Overview_Or_Ajax_Conditional::class,
Should_Index_Links_Conditional::class,
* Link_Count_Columns_Integration constructor
* @param Post_Type_Helper $post_type_helper The post type helper.
* @param wpdb $wpdb The wpdb object.
* @param Post_Link_Indexing_Action $post_link_indexing_action The post link indexing action.
* @param Admin_Columns_Cache_Integration $admin_columns_cache The admin columns cache.
public function __construct(
Post_Type_Helper $post_type_helper,
Post_Link_Indexing_Action $post_link_indexing_action,
Admin_Columns_Cache_Integration $admin_columns_cache
$this->post_type_helper = $post_type_helper;
$this->post_link_indexing_action = $post_link_indexing_action;
$this->admin_columns_cache = $admin_columns_cache;
public function register_hooks() {
\add_filter( 'posts_clauses', [ $this, 'order_by_links' ], 1, 2 );
\add_filter( 'posts_clauses', [ $this, 'order_by_linked' ], 1, 2 );
\add_action( 'admin_init', [ $this, 'register_init_hooks' ] );
// Adds a filter to exclude the attachments from the link count.
\add_filter( 'wpseo_link_count_post_types', [ 'WPSEO_Post_Type', 'filter_attachment_post_type' ] );
* Register hooks that need to be registered after `init` due to all post types not yet being registered.
public function register_init_hooks() {
$public_post_types = \apply_filters( 'wpseo_link_count_post_types', $this->post_type_helper->get_accessible_post_types() );
if ( ! \is_array( $public_post_types ) || empty( $public_post_types ) ) {
foreach ( $public_post_types as $post_type ) {
\add_filter( 'manage_' . $post_type . '_posts_columns', [ $this, 'add_post_columns' ] );
\add_action( 'manage_' . $post_type . '_posts_custom_column', [ $this, 'column_content' ], 10, 2 );
\add_filter( 'manage_edit-' . $post_type . '_sortable_columns', [ $this, 'column_sort' ] );
* Adds the columns for the post overview.
* @param array $columns Array with columns.
* @return array The extended array with columns.
public function add_post_columns( $columns ) {
if ( ! \is_array( $columns ) ) {
$columns[ 'wpseo-' . self::COLUMN_LINKS ] = \sprintf(
'<span class="yoast-linked-to yoast-column-header-has-tooltip" data-tooltip-text="%1$s"><span class="screen-reader-text">%2$s</span></span>',
\esc_attr__( 'Number of outgoing internal links in this post. See "Yoast Columns" text in the help tab for more info.', 'wordpress-seo' ),
/* translators: Hidden accessibility text. */
\esc_html__( 'Outgoing internal links', 'wordpress-seo' )
if ( $this->post_link_indexing_action->get_total_unindexed() === 0 ) {
$columns[ 'wpseo-' . self::COLUMN_LINKED ] = \sprintf(
'<span class="yoast-linked-from yoast-column-header-has-tooltip" data-tooltip-text="%1$s"><span class="screen-reader-text">%2$s</span></span>',
\esc_attr__( 'Number of internal links linking to this post. See "Yoast Columns" text in the help tab for more info.', 'wordpress-seo' ),
/* translators: Hidden accessibility text. */
\esc_html__( 'Received internal links', 'wordpress-seo' )
* Modifies the query pieces to allow ordering column by links to post.
* @param array $pieces Array of Query pieces.
* @param WP_Query $query The Query on which to apply.
public function order_by_linked( $pieces, $query ) {
if ( $query->get( 'orderby' ) !== 'wpseo-' . self::COLUMN_LINKED ) {
return $this->build_sort_query_pieces( $pieces, $query, 'incoming_link_count' );
* Modifies the query pieces to allow ordering column by links to post.
* @param array $pieces Array of Query pieces.
* @param WP_Query $query The Query on which to apply.
public function order_by_links( $pieces, $query ) {
if ( $query->get( 'orderby' ) !== 'wpseo-' . self::COLUMN_LINKS ) {
return $this->build_sort_query_pieces( $pieces, $query, 'link_count' );
* Builds the pieces for a sorting query.
* @param array $pieces Array of Query pieces.
* @param WP_Query $query The Query on which to apply.
* @param string $field The field in the table to JOIN on.
* @return array Modified Query pieces.
protected function build_sort_query_pieces( $pieces, $query, $field ) {
// We only want our code to run in the main WP query.
if ( ! $query->is_main_query() ) {
// Get the order query variable - ASC or DESC.
$order = \strtoupper( $query->get( 'order' ) );
// Make sure the order setting qualifies. If not, set default as ASC.
if ( ! \in_array( $order, [ 'ASC', 'DESC' ], true ) ) {
$table = Model::get_table_name( 'Indexable' );
$pieces['join'] .= " LEFT JOIN $table AS yoast_indexable ON yoast_indexable.object_id = {$this->wpdb->posts}.ID AND yoast_indexable.object_type = 'post' ";
$pieces['orderby'] = "yoast_indexable.$field $order, FIELD( {$this->wpdb->posts}.post_status, 'publish' ) $order, {$pieces['orderby']}";
* Displays the column content for the given column.
* @param string $column_name Column to display the content for.
* @param int $post_id Post to display the column content for.
public function column_content( $column_name, $post_id ) {
$indexable = $this->admin_columns_cache->get_indexable( $post_id );
// Nothing to output if we don't have the value.
if ( $indexable === false ) {
switch ( $column_name ) {
case 'wpseo-' . self::COLUMN_LINKS:
echo (int) $indexable->link_count;
case 'wpseo-' . self::COLUMN_LINKED:
if ( \get_post_status( $post_id ) === 'publish' ) {
echo (int) $indexable->incoming_link_count;
* Sets the sortable columns.
* @param array $columns Array with sortable columns.
* @return array The extended array with sortable columns.
public function column_sort( array $columns ) {
$columns[ 'wpseo-' . self::COLUMN_LINKS ] = 'wpseo-' . self::COLUMN_LINKS;
$columns[ 'wpseo-' . self::COLUMN_LINKED ] = 'wpseo-' . self::COLUMN_LINKED;