Comment obtenir des données de la base de données WordPress à l'aide de la requête WordPress $ wpdb?

Justepour clarifier laméthode get_var() de $wpdb fonctionnetrèsbien dans ce contexte:

 global $wpdb;
$helloworld_id = $wpdb->get_var("SELECT ID FROM wp_posts WHERE post_name = 'hello-world'");
echo $helloworld_id;
 

Enfait,c'estpluspratique dans ce contexte,car une seule variableest renvoyée,ce quiest réellement souhaité.

Just to clarify the get_var() method of $wpdb does work just fine in this context:

global $wpdb;
$helloworld_id = $wpdb->get_var("SELECT ID FROM wp_posts WHERE post_name = 'hello-world'");
echo $helloworld_id;

Actually it is more practical in this context, because a single variable is returned, which is what is actually wanted.

 global $wpdb;
$findID = $wpdb->get_results("SELECT ID FROM wp_posts WHERE post_name = 'hello-world'");
echo $findID[0]->ID;
 

I found the solution and the correct query to fetch one data from WordPress database is below one.

global $wpdb;
$findID = $wpdb->get_results("SELECT ID FROM wp_posts WHERE post_name = 'hello-world'");
echo $findID[0]->ID;