我有两个使用WP Logging 班它创建了一个名为Logs的自定义post类型，该类型（至少在我的情况下）仅在admin中可见，例如在/wp admin/edit中。php？s&；post\\u状态=全部（&U）；post\\U类型=wp\\U日志。

为了更容易判断哪个插件正在创建日志，我添加了几个挂钩。两个插件使用它们的方式相同。他们所做的是：

将可排序类型列添加到管理帖子屏幕，并将类型字段（WP日志库添加）添加到该屏幕以下是我使用的代码：

// add a sortable Type column to the posts admin
add_filter( \'manage_edit-wp_log_columns\', array( $this, \'type_column\' ), 10, 1 );
add_filter( \'manage_edit-wp_log_sortable_columns\', array( $this, \'sortable_columns\' ), 10, 1 );
add_action( \'manage_wp_log_posts_custom_column\', array( $this, \'type_column_content\' ), 10, 2 );

// filter the log posts admin by log type
add_filter( \'parse_query\', array( $this, \'posts_filter\' ), 10, 1 );
add_action( \'restrict_manage_posts\', array( $this, \'restrict_log_posts\' ) );

/**
 * Add a Type column to the posts admin for this post type
 *
 * @param array $columns
 * @return array $columns
 */
public function type_column( $columns ) {
    $columns[\'type\'] = __( \'Type\', \'form-processor-mailchimp\' );
    return $columns;
}

/**
 * Make the Type column in the posts admin for this post type sortable
 *
 * @param array $columns
 * @return array $columns
 */
public function sortable_columns( $columns ) {
    $columns[\'type\'] = \'type\';
    return $columns;
}

/**
 * Add the content for the Type column in the posts admin for this post type
 *
 * @param string $column_name
 * @param int $post_id
 */
public function type_column_content( $column_name, $post_id ) {
    if ( \'type\' != $column_name ) {
        return;
    }
    // get wp_log_type
    $terms = wp_get_post_terms(
        $post_id,
        \'wp_log_type\',
        array(
            \'fields\' => \'names\',
        )
    );
    if ( is_array( $terms ) ) {
        echo esc_attr( $terms[0] );
    }
}

/**
 * Filter log posts by the taxonomy from the dropdown when a value is present
 *
 * @param object $query
 * @return object $query
 */
public function posts_filter( $query ) {
    global $pagenow;
    $type     = \'wp_log\';
    $taxonomy = \'wp_log_type\';
    if ( is_admin() && \'edit.php\' === $pagenow ) {
        if ( isset( $_GET[\'post_type\'] ) && esc_attr( $_GET[\'post_type\'] ) === $type ) {
            if ( isset( $_GET[ $taxonomy ] ) && \'\' !== $_GET[ $taxonomy ] ) {
                $query->post_type = $type;
                $query->tax_query = array(
                    array(
                        \'taxonomy\' => $taxonomy,
                        \'field\'    => \'slug\',
                        \'terms\'    => esc_attr( $_GET[ $taxonomy ] ),
                    ),
                );
            }
        }
    }
}

/**
 * Add a filter form for the log admin so we can filter by wp_log_type taxonomy values
 *
 * @param object $query
 * @return object $query
 */
public function restrict_log_posts() {
    $type     = \'wp_log\';
    $taxonomy = \'wp_log_type\';
    // only add filter to post type you want
    if ( isset( $_GET[\'post_type\'] ) && esc_attr( $_GET[\'post_type\'] ) === $type ) {
        // get wp_log_type
        $terms = get_terms(
            [
                \'taxonomy\'   => $taxonomy,
                \'hide_empty\' => true,
            ]
        );
        ?>
        <select name="wp_log_type">
            <option value=""><?php _e( \'All log types \', \'form-processor-mailchimp\' ); ?></option>
            <?php
            $current_log_type = isset( $_GET[ $taxonomy ] ) ? esc_attr( $_GET[ $taxonomy ] ) : \'\';
            foreach ( $terms as $key => $term ) {
                printf(
                    \'<option value="%s"%s>%s</option>\',
                    $term->slug,
                    $term->slug == $current_log_type ? \' selected="selected"\' : \'\',
                    $term->name
                );
            }
            ?>
        </select>
        <?php
    }
}

我认为这值得一试（在所有的过滤器上，使用doing_action 在所有操作上）：

if ( ! doing_filter( \'manage_edit-wp_log_columns\' ) ) {
    add_filter( \'manage_edit-wp_log_columns\', array( $this, \'type_column\' ), 10, 1 );
}