在帖子编辑器中添加一个简单的复选框，以切换meta 不允许搜索引擎为您的内容编制索引的字段。然后钩住wp_head, 检查设置并打印该字段。

插件的示例代码：

add_action( \'post_submitbox_misc_actions\', \'show_noindex_checkbox\' );
add_action( \'save_post\', \'save_noindex\', 10, 2 );
add_action( \'wp_head\', \'insert_noindex_meta\' );

function show_noindex_checkbox()
{
    $post_id = get_the_ID();

    $name    = \'noindex\';
    $id      = $name . \'_id\';
    $value   = esc_attr( get_post_meta( $post_id, \'_noindex\', TRUE ) );
    $checked = checked( $value, 1, FALSE );
    $label   = \'Disallow search engine indexing\';
    $nonce   = wp_nonce_field( \'_noindex\', \'_noindex_nonce\', TRUE, FALSE );

    print <<<EOD
<div class="misc-pub-section">
    <label for="$id">
        <input type="checkbox" $checked id="$id" name="$name" value="1" />
        $nonce
        $label
    </label>
</div>
EOD;
}

function save_noindex( $post_id, $post )
{
    if ( wp_is_post_autosave( $post ) )
        return;

    if ( ! current_user_can( \'edit_post\', $post_id ) )
        return;

    if ( ! isset ( $_POST[ \'_noindex_nonce\' ] ) )
        return;

    if ( ! wp_verify_nonce( $_POST[ \'_noindex_nonce\' ], \'_noindex\' ) )
        return;

    if ( ! isset ( $_POST[ \'noindex\' ] ) )
        return delete_post_meta( $post_id, \'_noindex\' );

    if ( 1 != $_POST[ \'noindex\' ] )
        return;

    update_post_meta( $post_id, \'_noindex\', 1 );
}

function insert_noindex_meta()
{
    if ( is_singular() and \'1\' !== get_post_meta( get_the_ID(), \'_noindex\', TRUE ) )
        wp_no_robots();
}