外部のWordpressから読み込んだ記事を別のWordpressに自動で投稿したいです

Aサイトから読み込んだ記事をBサイトに自動で投稿させたいです。

また、そのAサイトの記事を更新したらBサイトで自動生成された記事も更新されるようにしたいです。

今の段階でのソースです。
`
global $wpdb;
$results = $wpdb->get_results("
SELECT post_title
FROM wp_posts
");

foreach ($results as $post) {
$page_exists = $post->post_title;
}

//その他DB接続設定
$another_db_user = 'user';
$another_db_pass = 'pass';
$another_db_name = 'name';
$another_db_host = 'localhost';
$another_tb_prefix = 'wp_';

$mydb = new wpdb($another_db_user,$another_db_pass,$another_db_name,$another_db_host);

$mydb->set_prefix($another_tb_prefix);

//一覧情報取得
$result = $mydb->get_results("
SELECT

m0.post_title,

m0.id,

m0.post_name,
m0.guid

FROM ( select post_title, id, guid, post_name from wp_posts where post_type = 'bio' AND post_status = 'publish' ) AS m0
");

foreach ($result as $value) {

if( $value->post_title == $page_exists ) {

//何もしない

}

else {
$my_access = Array(

'post_author' => '1',
'post_title' => ''.$value->post_title.'',
'post_status' => 'publish',
'comment_status' => 'closed',
'ping_status' => 'closed',
'post_name' => ''.$value->post_name.'',
'post_type' => 'page',
'post_parent' => '115822',
'page_template' => 'template-profile-info.php'
);

wp_insert_post($my_access);
}

}
`

これだと記事は重複されて繰り返し自動投稿します。

別のソースの案

$this_posts = get_posts(
                array(
                    'post_type' => 'page',
                    'page_template' => 'template-profile-info.php'
                )
            );

$this_post_titles = wp_list_pluck( $this_posts, 'post_title' );

// set the DB creds
$another_db_user = 'user';
$another_db_pass = 'pass';
$another_db_name = 'name';
$another_db_host = 'localhost';
$another_tb_prefix = 'wp_';

// setup the DB connection
$mydb = new wpdb( $another_db_user, $another_db_pass, $another_db_name, $another_db_host );

$mydb->set_prefix( $another_tb_prefix );

//一覧情報取得
$result = $mydb->get_results("
SELECT  
m0.post_title,  
m0.id,  
m0.post_name,
m0.guid  
FROM ( select post_title, id, guid, post_name from wp_posts where post_type = 'bio' AND post_status = 'publish'  ) AS m0 
");


foreach ( $result as $value ) {
    if ( in_array( $value->post_title, $this_post_titles ) ) {

    } else {
        $my_access = array(
                    'post_author' => '1',
                    'post_title' => $value->post_title,
                    'post_status' => 'publish',
                    'comment_status' => 'closed',
                    'ping_status' => 'closed',
                    'post_name' => $value->post_name,
                    'post_type' => 'page',
                    'post_parent' => '115822',
                    'page_template' => 'template-profile-info.php'
                  );

        wp_insert_post( $my_access );
    }
}

さらに別のソースの案

function wpse_20160318_do_db_sync() {

    // query the DB
    global $wpdb;
    $result = $wpdb->get_results(
        "
    SELECT post_name
    FROM wp_posts
    WHERE post_status = 'publish'
    AND post_type = 'page'
    "
    );



    // for all the results, let's check against the slug.
    foreach ( $result as $r ) {

        // see if we can find it...
        $post = get_page_by_path( $r->post_name );

    }

    // set the DB creds
    $another_db_user = 'user';
    $another_db_pass = 'pass';
    $another_db_name = 'name';
    $another_db_host = 'localhost';
    $another_tb_prefix = 'wp_';

    // setup the DB connection
    $mydb = new wpdb( $another_db_user, $another_db_pass, $another_db_name, $another_db_host );

    $mydb->set_prefix( $another_tb_prefix );

    //一覧情報取得
    $results = $mydb->get_results("
    SELECT  
    m0.post_title,  
    m0.id,  
    m0.post_name,
    m0.guid  
    FROM ( select post_title, id, guid, post_name from wp_posts where post_type = 'bio' AND post_status = 'publish'  ) AS m0 
    ");

    foreach ( $results as $value ) {


        if ( ! $post ) {
            // We're cool, let's create this one.
            $my_access = Array(

            'post_author' => '1',
            'post_title' => ''.$value->post_title.'',
            'post_status' => 'publish',
            'comment_status' => 'closed',
            'ping_status' => 'closed',
            'post_name' => ''.$value->post_name.'',
            'post_type' => 'page',
            'post_parent' => '115822',
            'page_template' => 'template-profile-info.php'
            );
            wp_insert_post($my_access); 

        }
        else {
            // No need to duplicate this one

        }

    }


}

// using on init to make sure the DB is ready to go
add_action( 'init', 'wpse_20160318_do_db_sync' );